What is the inverse of f(x)=sqrt(81-x^2) ?

The inverse of f(x)=sqrt(81-x^2) is sqrt(-x^2+81),-sqrt(-x^2+81)

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inverse of f(x)=sqrt(81-x^2)

inverse

f (x) = 81 - x^{2}

- x^{2} + 81, - - x^{2} + 81

Solution steps

y = 81 - x^{2}

Replace

x

with

y

x = 81 - y^{2}

Solve for

y, x = 81 - y^{2}

- x^{2} + 81, - - x^{2} + 81

f (x) = \frac{x - 4}{x + 5}

\frac{2 x}{x - 1}

f (x) = (2 \cdot x + 3) e^{(5 \cdot x)}

\frac{2}{( x + 1 ) ^{3}}

What is the inverse of f(x)=sqrt(81-x^2) ?
The inverse of f(x)=sqrt(81-x^2) is sqrt(-x^2+81),-sqrt(-x^2+81)