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Question

2x25x+1x2(x21)dx=

A
1x+logx5(x21)(x+1)2+
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B
1x+logx5(x21)(x+1)3+c
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C
1x+logx5(x21)(x+1)4+c
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D
1x+logx5(x21)(x+1)+c
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Solution

The correct option is D 1x+logx5(x21)(x+1)3+c
2x25x+1x2(x21)dx
=2x25x+1x2(x21)=Ax+Bx2+C(x1)+D(x+1)
C=22;D=8+2;B=1;A=5
C=1;D=4;B=1;A=5
5xdx1x2dx1(x1)dx4(x+1)dx.
logx5+1xlog(x1)log(x+1)dx
1x+logx51+log(1x1)+log(1(x+1)4)
1x+logx5(x21)(x+1)3+c

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