SSC CGL Model Paper 3

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Question : 65 of 100

Marks: +1, -0

{x ^2-yz }/{x ^2+yz}+{y^2-xz}/{y^2+xz}+{z^2-xy}/{z^2+xy}=1

then

{x ^2 }/{x ^2+yz}+{y^2 }/{y^2+xz}+{z^2 }/{z^2+xy}=?

1
2
3
-2

Solution:

{x ^2-yz }/{x ^2+yz}+1+{y^2-xz}/{y^2+xz}+1

+{z^2-xy}/{z^2+xy}+1=4

2({x ^2 }/{x ^2+yz}+{y^2 }/{y^2+xz}+{z^2 }/{z^2+xy})=4

⇒

{x ^2 }/{x ^2+yz}+{y^2 }/{y^2+xz}+{z^2 }/{z^2+xy}=2

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