SOLUTION: given the functions f(x)=3square root x+1 find f^-1(x)

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Question 920126: given the functions f(x)=3square root x+1 find f^-1(x)
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=3sqrt%28x%2B1%29

Finding inverse the quick way
x=3sqrt%28y%2B1%29
x%5E2=9%28y%2B1%29
y%2B1=%281%2F9%29x%5E2
y=-1%2B%281%2F9%29x%5E2
highlight%28y=%281%2F9%29x%5E2%2B1%29 with the restriction highlight%28x%3E=0%29.