Need help with a Precalculus question. Help appreciated
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Need help with a Precalculus question. Help appreciated

[From: ] [author: ] [Date: 12-03-10] [Hit: ]
I think I may be over-thinking this one, so I am just checking for clarificationLet f(x)= x^3+2x+1 and assume that f^-1 exists and has domain (-∞,∞), Simplify each expression.A) f(0) = 1=>whenx=0 ,B) f^-1(1) = 0 => from above A) we can tell.......
Hey guys, would really appreciate some help and guidance with this homework problem. Thanks in advance! I think I may be over-thinking this one, so I am just checking for clarification
Let f(x)= x^3+2x+1 and assume that f^-1 exists and has domain (-∞,∞), Simplify each expression.

A) f(0) B) f^-1(1) C) f(-1) D) f^-1 (-2)

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f(x)= x^3+2x+1
A) f(0) = 1 =>when x=0 , y =1 => note : inverse function is x change to y

B) f^-1(1) = 0 => from above A) we can tell.

C) f(-1) = -1-2+1 = -2

D) f^-1 (-2) = -1
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