If f(x) = `(x - 2)/(x + 2)`, then f(α x) = ______ - Vidyadip

MCQ

If f(x) = `(x - 2)/(x + 2)`, then f(α x) = ______

A
`(f(alphax) - 1)/(f(ax) + 1)`
✓
`((alpha + 1)f(x) + alpha - 1)/((alpha - 1)f(x) + (alpha + 1))`
C
`((alpha - 1)f(x) + alpha + 1)/((alpha + 1)f(x) + (alpha - 1))`
D
`(f(x) + alpha)/(1 + alphaf(x))`

✓

Answer

Correct option: B.

`((alpha + 1)f(x) + alpha - 1)/((alpha - 1)f(x) + (alpha + 1))`

B

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