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Question

Write a value of 11+2ex dx.

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Solution

Let I=dx1+2exDividing numerator & denominator by exI=1exdx1ex+2 =e-x dxe-x+2Let e-x+2=t-e-x dx=dte-x dx=-dtI=-dtt =-log t+C =-log e-x+2+C t=e-x+2

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