Explanation
dydx=yx2(given)
∫dydx=∫dxx2
⇒logy=−1x+c
⇒y=e−1x+c
⇒y=e−1x,c
since this curve is passing through point (1,3)
so, 3=e−1t.c
⇒c=3e
therefore , eqn of the curve is
y=e−1x.3e
⇒y=3e−1x+1
⇒y=3e1−1x
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