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Sveta_85 [38]
3 years ago
11

Find the inverse function for f(x) = cubic root sqrt x+2

Mathematics
2 answers:
Alecsey [184]3 years ago
7 0

f(x)=\sqrt[3]{x+2}\to y=\sqrt[3]{x+2}

we replace x with y

\sqrt[3]{y+2}=x\ \ \ \ |^3\\\\y+2=x^3\ \ \ \ |-2\\\\y=x^3-2

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

dalvyx [7]3 years ago
6 0

we are given

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

Firstly , we set f(x)=y

y=\sqrt[3]{x+2}

now, we can switch x and y

x=\sqrt[3]{y+2}

now, we can solve for y

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

x^3=y+2

y=x^3-2

so, our inverse function is

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

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