CDS Model Paper 1 Mathematics

We have,

y

x−z

=

y+x

z

⇒ yz=xy+x2−yz−xz ...(i)
Also,

x

y

=

y

x−z

⇒x2−xz=y2 ...(ii)
From (i) and (ii), we have
yz=xy−yz+y2
⇒ 2yz=xy+y2
∴ 2z=x+y
Checking with the options, we find that the values given in option (c) satisfies the equation (iii)