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AP EAMCET · Maths · Indefinite Integration

If x4(x-1)(x-2)=f(x)+Ax-1+Bx-2, then

  1. A f(x)=x23x+7
  2. B f(x)=x2+3x+7
  3. C A+B=17
  4. D AB=18
Verified Solution

Answer & Solution

Correct Answer

(B) f(x)=x2+3x+7

Step-by-step Solution

Detailed explanation

Given x4(x-1)(x-2)=f(x)+Ax-1+Bx-2 ⇒x4(x-1)(x-2)=f(x)x-1x-2+Ax-2+Bx-1x-1x-2 ⇒x4=f(x)x-1x-2+Ax-2+Bx-1 On putting x=1, we get A=-1 On putting x=2, we get B=16 Then, x4=f(x)x-1x-2-x-2+16x-1 ⇒x4-16x+16+x-2=f(x)x-1x-2 ⇒f(x)=x4-15x+14x-1x-2 On adding and…