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JEE Questions for Maths Applications Of Derivatives Quiz 11 - MCQExams.com
JEE
Maths
Applications Of Derivatives
Quiz 11
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Which one is the correct statement about the function f(
x
) = sin 2
x
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2)
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The statements (a), (b) and (c) are all correct
The function f defined by f(
x
) = (
x
+ 2)e
–
x
is
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Decreasing for all x
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Decreasing in (–∞, –and increasing (–1, ∞)
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Increasing for all x
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Decreasing in (–1, ∞) and increasing in (–∞, –1)
If f(
x
) =
x
3
– 10
x
2
+ 200
x
– 10 then
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f(x) is decreasing in [ – ∞, 10] and increasing in [10, ∞]
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f(x) is increasing in [–∞, 10] and decreasing in [10, ∞]
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f(x) is increasing through real line
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f(x) is decreasing through real line
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Both f(x) and g (x) are increasing functions
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Both f(x) and g(x) are decreasing functions
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f(x) is an increasing function
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g(x) is an increasing function
Select the correct statement from (a), (b), (c), (d). The function f(
x
) =
x
e
1–
x
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If f(
x
) =
x
2
+ a
x
+ 5 is increasing function in (2,then the minimum value of a is…; a ϵ R
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2
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–4
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–2
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4
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ad – bc > 0
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ad – bc < 0
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ab – ad > 0
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ab – cd < 0
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Increasing when x ≥ 0
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Strictly increasing when x > 0
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Strictly increasing at x = 0
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Not continuous at x = 0 and so it is not increasing when x > 0
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cosec x
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tan x
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x2
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|x – 1|
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λ > 1
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λ < 1
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λ < 4
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λ>4
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Strictly decreasing
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Strictly increasing
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Decreasing in (2,only
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Neither increasing nor decreasing
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2)
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None of these
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(1,2e)
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(0, e)
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(2, 2e)
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An increasing function
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A decreasing function
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Both increasing and decreasing function
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None of the above
The function f(
x
) =
x
+ cos
x
is
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Always increasing
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Always decreasing
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Increasing for certain range of x
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None of the above
The function f(
x
) =
x
1/
x
is
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Increasing in (1, ∞)
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Decreasing in (1, ∞)
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Increasing in (1, e) decreasing in (e, ∞)
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Decreasing in (1, e), increasing in (e, ∞)
The function
x
x
is increasing, when
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For all real x
A function is matched below against an interval where it is supposed to be increasing. Which of the following pairs is incorrectly matched?
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The length of the longest interval, in which the function 3 sin
x
– 4 sin
3
x
increasing is
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Let f(
x
) =
x
3
+ b
x
+ c
x
+ d, 0 < b
2
< c. Then f
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Is bounded
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Has a local maxima
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Has a local minima
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Is strictly increasing
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Increasing
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Decreasing
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Stationary
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Discontinous
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The function f(
x
) = tan
–1
(sin
x
+ cos
x
),
x
> 0 is always an increasing function on the interval
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2)
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Increasing
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Decreasing
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Even
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None of these
The function f(
x
) = a
x
+ b is strictly increasing for all real
x
if
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a > 0
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a < 0
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a = 0
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a ≤ 0
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[1.5, 3]
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For no interval
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[0, 3]
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[–3, 0]
Rolle’s theorem is not applicable to the function f(
x
) = |
x
| defined on [–1, 1] because
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f is not continuous on [–1, 1]
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f is not differentiable on (–1, 1)
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f(– ≠ f(1)
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f(–= f(≠ 0
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1
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2
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None of these
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None of these
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None of these
A function f is defined by f(
x
) = e
x
sin
x
in [0, π]. Which of the following is not correct
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f is continuous in [0, π]
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f is differentiable in [0, π]
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f(= f(π)
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Rolle’s theorem is not true in [0, π]
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0
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None of these
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3
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0
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1
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2
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a = – 11
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a = – 6
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a = 6
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a = 11
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The abscissa of the points of the curve y =
x
3
in the interval [–2,2], where the slope of the tangents can be obtained by mean value theorem for the interval [–2, 2], are
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The function f(
x
) = (
x
– 3)
2
satisfies all the conditions of mean value theorem in [3, 4]. A point on y = (
x
– 3)
2
, where the tangent is parallel to the chord joining (3,and (4,is
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(1, 4)
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(4, 1)
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In which of the following functions, Rolle’s theorem is applicable
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