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AP EAMCET201823 Apr 2018Evening ShiftMathematicsDifferentiationActual

If a>0 and f(x)= ( a+x 1+x )^ a+1+2 x , then f^ (0)=

Options

  1. Aa^ a+1
  2. Ba^ a+1 1-a^2 a +2 a
  3. C2 a
  4. Da^ a+1 (1+a)^2 a-2 a

Correct answer

B. a^ a+1 1-a^2 a +2 a

Step-by-step solution

Given function, for a>0 aligned & f(x)= ( a+x 1+x )^ a+1+2 x f(0)=a^ a+1 & f(x)=(a+1+2 x) ( a+x 1+x ) aligned On differentiating both side with respect to ' x ', we are getting aligned & f^ (x) f(x) =2 ( a+x 1+x )+(a+1+2 x) 1 a+x - 1 1+x & So, f^ (0)=f(0) [2 (a)+(a+1) ( 1 a -1 ) ] & f(0)=a^ a+1 aligned So, f^ (0)=a^ a+1 1-a^2 a +2 a .

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