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AP EAMCET · Maths · Indefinite Integration

If exxx+xdx=exAx+Bx+C+K, then A+B+C=

  1. A -2
  2. B 2
  3. C 4
  4. D -4
Verified Solution

Answer & Solution

Correct Answer

(B) 2

Step-by-step Solution

Detailed explanation

I=∫exxx+xdx Let x=t 12xdx=dt i.e. I=2∫ett2+tdt =2∫t2etdt+2∫tetdt =2t2et-2∫2tetdt+2∫tetdt =2t2et-2∫tetdt =2t2et-2tet-∫etdt=2t2et-2tet+2et+C' =ex2x-2x+2+C' Hence, A+B+C=2