For x > 1 , if 2 x 2 y = 4 e 2 x - 2 y , then 1 + log e ⁡ 2 x 2   d y d x is equal to

For x>1, if 2x2y=4e2x-2y, then 1+loge2x2 dydx is equal to
  1. loge2x
  2. xloge2x-loge2x
  3. xloge2x
  4. xloge2x+loge2x

Solution

Given, 2x2y=4.e2x-2y

Taking natural logarithm on both sides, we get

2yloge2x=loge4+2x-2y

2y=loge4+2x1+loge2x

Differentiating both sides with respect to x, we get

2dydx=1+loge2x.2-loge4+2x1x1+loge2x2 (Using quotient rule)

1+loge2x2dydx=x.loge2x-loge2x.

Asked in: JEE Main 2019 (12 Jan Shift 1)

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