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JEE Questions for Maths Applications Of Derivatives Quiz 4 - MCQExams.com
JEE
Maths
Applications Of Derivatives
Quiz 4
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Statement I is correct, Statement II is also correct; Statement II is the correct explanation of Statement I
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Statement I is correct, Statement II is also correct; Statement II is not the correct equation of Statement I
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Statement I is correct, statement II is correct
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Statement I is incorrect, Statement II is correct
The equation of the tangent of the curve y =
x
+ 4/
x
2
that is parallel to the X - axis is
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y = 0
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y = 1
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y = 2
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y = 3
The point in the interval [0, 2π], where
f
(
x
) = e
x
sin
x
has maximum slope is
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π/4
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π/2
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π
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3π/2
The point on the curve
x
2
+ y
2
= a
2
, y ≥ 0 at which the tangent is parallel to X - axis is
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(a, 0)
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(-a, 0)
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(0, a)
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(0, a2)
The angle between the curves y =
x
2
and y
2
-
x
= 0 at the point (1,is
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π/2
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tan-1 4/3
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π/3
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π4
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tan-1 3/4
The distance between the origin and the normal to the curve y = e
2
x
+
x
2
at
x
= 0 is
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2
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2/√3
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2/√5
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1/2
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1/√5
Let P(
x
) =
x
4
+ a
x
3
+ b
x
2
+ c
x
+ d such that
x
= 0 is the only real root of P'(
x
) = 0. If P(-1), then in the interval [-1, 1]
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P(-is the minimum and P(is the maximum of P
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P(-is not minimum but P(is the maximum of P
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P(-is minimum and P(is not maximum of P
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Neither P(-is the minimum and P(nor is the maximum of P
The shortest distance between the line y -
x
= 1 and the
x
= y
2
is
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0%
2)
0%
0%
The equation of the tangent to the curve y = 4e
x
at (-1, -4/e) is
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y = - 1
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- (4/e)
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x = - 1
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x = -4/e
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16
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12
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8
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4
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2
The equation of the tangent to the curve y = 4e
-
x
/4
at the point, where the curves crosses Y - axis is equal to
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3x + 4y = 16
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4x + y = 4
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x + y = 4
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4x - 3y = -12
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x - y = -4
The angle between the curves y = a
x
and y = b
x
is equal to
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0%
0%
2)
0%
0%
0%
If a and b are positive numbers such that a > b, then the minimum value of a sec θ - b tan θ (where, 0 < θ < π/is
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0%
2)
0%
0%
0%
The angle between y
2
=
x
and
x
2
= y at the origin is
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2 tan-1 (3/4)
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tan-1 (4/3)
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π/2
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π/4
The length of the normal to the curve
x
= a(θ + sin θ), y = a(1 - cos θ) at θ = π/2 is
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2a
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a/2
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a/√2
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√2a
The smallest circle with centre on Y - axis and passing through the point (7,has radius
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√58
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7
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3
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4
If sum of two numbers is 6, then the minimum value of the sum of their reciprocals is
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6/5
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3/4
0%
2/3
0%
1/2
The function
f
(
x
) =
x
3
+ a
x
2
+ b
x
+ c, a
2
≤ 3b has
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one maximum value
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one minimum value
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no extreme value
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one maximum and one minimum value
If
f
(
x
) =
x
2
+ 4
x
+ 1, then
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f(x) = f(-x), ∀ x
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f(x) ≠ 1, ∀ x = 0
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f ''(x) > 0, ∀ x
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f(x) > 1, for x ≤ 4
If the cubic equation
x
3
- p
x
+ q has three distinct real roots, where p > 0 and q < 0. Then, which one of the following is correct ?
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0%
0%
2)
0%
0%
The slope of the tangent to the curves
x
= t
2
+ 3t - 8, y = 2t
2
-2t - 5 at the point (2, -is
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22/7
0%
6/7
0%
-6
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-7
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1
0%
2/e
0%
e
0%
1/e
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x = 0
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x = 1
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x = 4
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x = 3
If m and M respectively denote the minimum and maximum of
f
(
x
) = (
x
- 1)
2
+ 3 for
x
ϵ [-3, 1], then the ordered pair (m, M) is equal to
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(-3, 9)
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(3, 19)
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(-19, 3)
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(-19, -3)
The length of the subtangent at (2,to the curve
x
5
= 2y
4
is
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5/2
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8/5
0%
2/5
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5/8
The equation of the normal to the curve y
4
= a
x
3
at (a, a) is
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x + 2y = 3a
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3x - 4y + a = 0
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4x + 3y = 7a
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4x - 3y = 0
If y = 4
x
- 5 is a tangent to the curve y
2
= p
x
3
+ q at (2, 3), then
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p = 2, q = -7
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p = - 2, q = 7
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p = -2, q = -7
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p = 2, q = 7
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a local maxima at x = 1 and a local minima at x = - 1
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a local minima at x = 1 and a local maxima at x = - 1
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absolute maxima at x = 1 and absolute minima at x = -1
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absolute minima at x = 1 and absolute maxima at x = -1
The normal to a curve at P(
x
, y) meets the X - axis at G. If the distance of G from the origin is twice the abscissa of P, then the curve is a
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ellipse
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parabolla
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circle
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hyperbola
The minimum value of 2
x
+ 3y, when
x
y = 6 is
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9
0%
12
0%
8
0%
6
If the function
f
(
x
) =
x
2
e
-2
x
,
x
> 0. Then, the maximum value of
f
(
x
) is
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1/e
0%
1/2e
0%
1/e2
0%
4/e4
The angle between the tangents at those points on the curve
x
= t
2
+ 1 and y = t
2
- 1 - 6, where it meets X - axis is
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0%
0%
2)
0%
0%
If the function
f
(
x
) = 2
x
3
- 9a
x
2
+ 12a
2
x
+ 1 attains its maximum and minimum at p and q respectively, such that p
2
= q, then a equals
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0
0%
1
0%
2
0%
None of these
The point on the curve y
2
=
x
, the tangent at which makes an angle 45
o
with X - axis is
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0%
0%
2)
0%
0%
A missile is fired from the ground level rises
x
metres vertically upwards in t sec, where
x
= 100t - (25/2)t
2
. The maximum height reached is
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200 m
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125 m
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190 m
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300 m
The maximum slope of the curve y =
x
+ 3
x
2
+ 2
x
- 27 is
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5
0%
-5
0%
1/5
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None of these
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- (1/3)
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- (1/4)
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1/4
0%
1/6
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(b, a)
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(-b, -a)
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(a, b)
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None of these
The length of tangent, subtangent, normal and subnormal for the curve y =
x
2
+
x
- 1 at (1,are A, B C and D respectively, then their increasing order is
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B, D, A, C
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B, A, C, D
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A, B, C, D
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B, A, D, C
The condition
f
(
x
) =
x
3
+ p
x
2
+ q
x
+ r (
x
ϵ R) to have no extreme value, is
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p2 < 3q
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2p2 < q
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p2 < 1/4q
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p2 > 3q
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Both A and R are correct and R is the correct reason for A
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Both A and r correct but R is not the correct reason for A
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A is correct, R is incorrect
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A is incorrect, R is correct
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3
0%
1/3
0%
2
0%
1/2
On the interval [0, 1], the function
x
25
(1 -
x
)
75
takes its maximum value at the point
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0
0%
1/4
0%
1/2
0%
1/3
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a local maximum
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a local minimum
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no local extremum
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no local maximum
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x = - 2
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x= 0
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x = 1
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x = 2
Angle between the tangents to the curve y =
x
2
- 5
x
+ 6 at the points (2,and (3,is
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0%
π/2
0%
π/6
0%
π/4
0%
π/3
If the curve y = 2
x
3
+ a
x
2
+ b
x
+ c passes through the origin and the tangent drawn to it at
x
= - 1 and
x
= 2 are parallel to the X - axis, then the values of a, b and c are respectively
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12, -3 and 0
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-3, -12 and 0
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-3, 12 and 0
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3, -12 and 0
The tangent and the normal drawn to the curve y =
x
2
-
x
+ 4 at P(1,cut the X - axis at A and B, respectively. If the length on the subtangent drawn to the curve at P is equal to the length of the subnormal, then the area of the ∆PAB(in sq units) is
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4
0%
32
0%
8
0%
16
If the line a
x
+ by + c = 0 is a normal to the curve
x
y = 1, then
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a > 0, b > 0
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a > 0, b < 0
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a < 0, b < 0
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Data is insufficient
The maximum value of
x
1/
x
is
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1/ee
0%
e
0%
e1/e
0%
1/e
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