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Aleksandr-060686 [28]
3 years ago
13

Please help me find the inverse

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
5 0

f^{-1}(x) is supposed to be a function such that

f^{-1}(f(x))=x

In this case, we need

f^{-1}(\sqrt[3]{x-2})=x

To recover x from \sqrt[3]{x-2}, we would first need to raise \sqrt[3]{x-2} to the third power:

(\sqrt[3]{x-2})^3=x-2

Then add 2:

(x-2)+2=x

To recap, we carried out

f^{-1}(\sqrt[3]{x-2})=(\sqrt[3]{x-2})^3+2=x

which implies that the inverse function is

f^{-1}(x)=x^3+2

To verify: we should also have that f(f^{-1}(x))=x. We get

f(x^3+2)=\sqrt[3]{(x^3+2)-2}=\sqrt[3]{x^3}=x

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