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Question

If ln=(1+x+x1)ex+x1dx=

A
x1.ex+x1+C
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B
x.ex+x1+C
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C
(x+1).ex+x1+C
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D
(x2+1).ex+x1+C
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Solution

The correct option is B x.ex+x1+C
I=(1+xx1)ex+x1 dx=ex+x1 dx+x(11x2)ex+x1 dx=ex+x1 dx+x.ex+x1ex+x1 dx=x.ex+x1+c

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