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AP EAMCET2010MathematicsDifferentiation

If f(x)= x+ x , then f ( 4 ) f^ (i v) ( 4 ) is equal to

Options

  1. A1
  2. B2
  3. C3
  4. D4

Correct answer

B. 2

Step-by-step solution

f(x)= x+ xf^ (x)= x- xf^ (x)=- x- xf^ (x)=- x+ xf^ (x)= x+ x So, f ( 4 )=f^ ( 4 )= ( 4 )+ ( 4 )= 1 2 + 1 2 = 2 2 = 2 Then, f ( 4 ) f^ ( 4 )= 2 2 =2

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