JEE Main · 2022 · 25 Jun 2022 · Shift 1 · Differentiation

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Let be defined as . If is a function such that , , then (63) is equal to
  1. (A)✓ Correct
  2. (B)
  3. (C)
  4. (D)

Answer: (A)

Solution

Since , we have , so is strictly increasing and invertible. Thus . From , differentiating gives , so . To find , we need , i.e., solve : gives , so . Then , and .

JEE Main · 2022 · 25 Jun 2022 · Shift 1 · Single correct option

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