SOLUTION: Given that f : x —> 2x^2 + 8x - 10 for the domain x ≥ k. i) find the least value of k for which f is one-one. ii) express f^-1(x) in terms of x in this case.

SOLUTION: Given that f : x —> 2x^2 + 8x - 10 for the domain x ≥ k. i) find the least value of k for which f is one-one. ii) express f^-1(x) in terms of x in this case.

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Question 1200274: Given that f : x —> 2x^2 + 8x - 10 for the domain x ≥ k.
i) find the least value of k for which f is one-one.
ii) express f^-1(x) in terms of x in this case.
Answer by Solver92311(821) (Show Source): You can put this solution on YOUR website!

is the

-coordinate of the vertex of the parabola.

Substitute

for

. Then solve for

in terms of

. Then swap

for

and replace

with

on the domain established by the first part of the problem.

John

My calculator said it, I believe it, that settles it

From
I > Ø

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