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Question

3x2(x+1)2(x+3)dx

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Solution

a=3x2(x+1)2(x+3)dx
Using partial fraction
=(114(x+3)+114(x+1)52(x+1)2)dx
=1141x+3dx+114dx+1dx=S21(x+1)2dx
Sub x+3=4 Sub x+1=5, ds=dx sub (x+1)2=p2
=114log(4)+114log(s)s21p2dp
=52p+11log(5)411log(4)4+ constant
=14(11log(a)+10x+1+11log(x+1))+ constant
Ans: 14(10x+1+11log(x+1)11log(x+3))+ constant.

1215134_1317406_ans_fb218b8786284fb2a3750356a4a5cbf0.jpeg

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