AP EAMCET · Maths · Differentiation
If and satisfies , then at is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
We have, 8fx+6f1x=x+5⇒f-1=27 Differentiating on both sides 8f'x-6x2f'1x=1 Put x=-1⇒f'-1=12 Now differentiating y=x2fx we get, dydx=2xfx+x2f'x at x=-1,dydx=2-1×27+-1212=-114
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