反函數01
如圖,請問要如何解呢?謝謝!回復 1# shmilyho 的帖子
[img]https://i.imgur.com/NDHQ4Xo.png[/img] 谢谢! \(f \circ f = \left(f\circ g\right) \circ \left(g^{-1} \circ f\right) \)\(\displaystyle \Rightarrow f \circ f : 3\left(\sqrt{5x+2}\right)^2 -1 = 15x+5, \forall x\geq -\frac{2}{5}\)
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