SOLUTION: {{{f(x)=x^2-5}}}; x is greater than or equal to zero Why is this a one-to-one function?

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Question 1101636: f%28x%29=x%5E2-5; x is greater than or equal to zero
Why is this a one-to-one function?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=x^2-5 ; x is greater than or equal to zero
Why is this a one-to-one function?
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Because you are restricting a parabola to its right half.
A parabola symetric to the y-axis is not one-to-one, but
the right half is one-to-one (so is the left half).
To see that, draw the figure.
Cheers,
Stan H.
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