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1967 AMC 12 Question 14

AMC12 · 1967 AMC 12

Question 14

Let $f(t)=\dfrac{t}{1-t},$ $t\ne1.$ If $y=f(x),$ then $x$ can be expressed as:
  1. $f\left(\dfrac1y\right)$
  2. $-f(y)$
  3. $-f(-y)$
  4. $f(-y)$
  5. $f(y)$