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Question

If f(x)=x+2x1=y, then.
  1. x=f(y)
  2. f(1)=3
  3. f(y)=2f(x)
  4. f(y)=2+f(x)

A
f(y)=2f(x)
B
f(y)=2+f(x)
C
x=f(y)
D
f(1)=3
Solution
Verified by Toppr

Given, f(x)=x+2x1=y

=>x+2=y(x1)

=>y+2=xyx

=>x(y1)=(y+2)

=>x=y+2y1

=>x=f(y)

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