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September 21, 2014

September 21, 2014

Posted by **Carla** on Tuesday, August 7, 2012 at 9:51am.

does f(x) have an inverse? if so, find the inverse and decide if it is a function.

2. if f(x)= 3x+1 and g(x)= x^2-1, find

(f∙ g)(2)

3. if f(x)= (2x)^2, find f(-4)

thank you :)

- algebra/trig -
**Reiny**, Tuesday, August 7, 2012 at 10:39am1. let y = x^3 + 5

inverse is x = y^3 + 5

y^3 = x-5

y = (x-5)^(1/3)

yes , it is a function

2. (f∙ g)(2) = f(g(2))

= f(3)

= 10

3. Come on, you can do this!

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