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MHT CET2016MathematicsDifferentiation

If log 10 ⁡ x 2 - y 2 x 2 + y 2 = 2 , then d y d x = _______

Options

  1. A- 99 x 101 y
  2. B99 x 101 y
  3. C- 99 y 101 x
  4. D99 y 101 x

Correct answer

A. - 99 x 101 y

Step-by-step solution

Given, log 10 ⁡ x 2 - y 2 x 2 + y 2 = 2 ⇒ x 2 - y 2 x 2 + y 2 = 100 ⇒ x 2 - y 2 - 100 x 2 - 100 y 2 x 2 + y 2 = 0 ⇒ - 99 x 2 - 101 y 2 x 2 + y 2 = 0 ⇒ 99 x 2 + 101 y 2 = 0 ⇒ 2 × 99 x + 2 × 101 y d y d x = 0 ⇒ d y d x = - 99 x 101 y

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