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Question

If x+y+z=0, then value of (x+y)(y+z)(z+x)xyz+11 is ?

A
x+11
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B
y+11
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C
z+11
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D
10
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Solution

The correct option is C 10
x+y+z=0x+y=zy+z=xz+x=y
Substituting the above in the expression given:
(z)(x)(y)xyz+11=1+11=10

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