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Question
Let `"f"("x") = ("x" - 1)/("x" + 1),` then f(f(x)) is ____________.
Options
`1/"x"`
`-1/"x"`
`1/("x" + 1)`
`1/("x" - 1)`
MCQ
Fill in the Blanks
Solution
Let `"f"("x") = ("x" - 1)/("x" + 1),` then f(f(x)) is `underline(-1/"x")`.
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