I want to know how to find the inverse of this one-to-one function

Algebra
Tutor: None Selected Time limit: 1 Day

x^2-7,x is greater than or equal to 0

May 11th, 2015

 y= x^2 -7

f(x) = y

x= f^-1(y)

y+7 =x^2

x= (y+7)^1/2

f^-1(y) =(y+7)^1/2

               or 

 f^-1(x) =( x+7)^1/2

 x =0 or x>-7


 regarding any explanation please let me know.

 

May 11th, 2015

sry  here

X >-7 or X = -7 

May 11th, 2015

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