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## Homework Statement

I'm not sure what I'm doing wrong here.

## Homework Equations

f(t) = t/(t+1)

^{2}find f(1/t)

## The Attempt at a Solution

f(1/t) = 1/(t/(t+1)

^{2})

= ((t+1)

^{2})/t

= (t

^{2}+ 2t +1)/t

The answer in my book says it's t/(t+1)

^{2}, the original function. Is this an error?