codygirl331
Oct 14, 2008, 07:56 PM
evaluate the function for f(x)=x^2+8 and g(x)=x-9
1.) (fg)(-5)
2.) (f-g)(-8)
help I can't get the right answer
ebaines
Oct 15, 2008, 10:05 AM
Your notation here is a bit confusing. For the first question, is that supposed to be f(-5)*g(-5), or is it f(g(-5))?
If the latter, then what you do is first find the value of g(-5), then shove that value as x into f(x).
I've not seen the notation (f-g)(-5) before - perhaps it means f(-5) - g(-5)? If so, then it's pretty straight forward.