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.

Algebra ->  Test -> 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.      Log On


   

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) About Me  (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

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