a) f(x) = 10^x

b) f(x) = x^2 - 10

c)

_x_|_f(x)_

..-3|-1

..-1|0

...0|-1

...2|3

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- Jan 27th 2010, 05:48 PMMarinoWhich of these functions have inverse(s) and why?
a) f(x) = 10^x

b) f(x) = x^2 - 10

c)

_x_|_f(x)_

..-3|-1

..-1|0

...0|-1

...2|3 - Jan 27th 2010, 06:14 PMbattleman13
I'll get you started...

f(x) for any x should give a unique answer... if it does not then your function has no inverse

examine f(x) = $\displaystyle x^2 $ - Jan 27th 2010, 06:21 PMVonNemo19
- Jan 27th 2010, 06:25 PMMarino
Yes, I know what an inverse function is. It's when the dependent and independent variables of a function are interchanged.

No, I've never heard of the horizontal line test before. - Jan 27th 2010, 07:35 PMStroodle
This site Inverse Functions: Definition / Drawing Inverses explains it well.