TS ICET 1 Oct 2020 Shift 1 Paper

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Question : 114 of 200

Marks: +1, -0

For

x \≠-1

, define

f(x)={x-1}/{x+1}

, then

{f(x)-f(y)}/{1+f(x) f(y)}=

${x+y}/{1-x y}$
${x-y}/{1+x y}$
${x+y}/{x-y}$
1

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