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99 Percentile Qs Bank for JEE MainMathematicsLimits

If f (9)=9 and f ^ (9)=4 , then _ x 9 f(x) -3 x -3 =

Options

  1. A3
  2. B4
  3. C6
  4. D9

Correct answer

B. 4

Step-by-step solution

aligned & _ x 9 f(x) -3 x -3 = & _ x 9 f^ (x) 2 f(x) 1 2 x ( 0 0 form ) = & _ x 9 f^ (x) f(x) x aligned = f^ (9) f(9) 9 = 4 3 4=4 .

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