im reallly not getting this Let f(x) = x2 - 81. Find f-1(x).

Algebra
Tutor: None Selected Time limit: 1 Day

Let f(x) = x2 - 81. Find f-1(x).

Nov 26th, 2014

To find the inverse function, you switch x and y and solve for y.

y = x^2 - 81

Switch x and y:

x = y^2 - 81

Now solve for y:

x + 81 = y^2

y = sqrt(x+81)

Nov 26th, 2014

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Nov 26th, 2014
...
Nov 26th, 2014
Mar 27th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer