f-x-x-f-1-x-solution-

Question Number 191579 by 073 last updated on 26/Apr/23

f (x) =∣ x ∣

f^{- 1} (x) = ?

solution ?

Answered by mr W last updated on 26/Apr/23

y = f (x) =∣ x ∣

\Rightarrow x = \pm y w i t h y ⩾ 0

\Rightarrow f^{- 1} (x) = \pm x w i t h x ⩾ 0

Answered by mehdee42 last updated on 26/Apr/23

f, i n R, i s n o t, o n e t o o n e . t h e r e f o r e i t i s n o t i n v e r t a b l e .

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