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Question

The value of xa+bxb+cxc+a(xaxbxc)2 is

A
x2
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B
xa+b+c
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C
xabc
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D
x0
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Solution

The correct option is D x0
xa+bxa+bxa+b(xaxbxc)2=xaxbxbxcxcxa(xaxbxc)2

=xaxaxbxbxcxc(xaxbxc)2

=xa+axb+bxc+c(xaxbxc)2

=x2ax2bx2c(x2ax2bx2c)

=x2(a+b+c)x2(a+b+c)

=x2(a+b+c)2(a+b+c) =x0

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