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Mathematics 11 Online
OpenStudy (anonymous):

Let f(x) = x2 − 81. Find f−1(x).

OpenStudy (anonymous):

y = x² - 81 Start by switching x and y. Then solve for the "new" x.

OpenStudy (anonymous):

It does not have an inverse. Or at lest its inverse is not a function

OpenStudy (anonymous):

@sourwing is correct. are you restricting the domain?

OpenStudy (anonymous):

I have a few options though... im confused

OpenStudy (anonymous):

what are the options?

OpenStudy (anonymous):

|dw:1433113222980:dw|

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