I need some help with function problems. Thanks!!!
1. find the domain of p(x)=(x^2-2x/x-1) all under a square root sign.
I was thinking that x could not equal 1,2 the 1 would make the denominator 0 and the 2 would make the numerator 0. So I have no idea because it wasn't the right answer at all.
2. Given the function f(x)=1/x+1
find the following expression and simplfy: f(a+h)-f(a)/h
3. Find the average rate of change of the function f(t)=(t)^1/2 so t square rooted. between t=a and t=a+t
I got to here
I know that in the denominator the a's cancel out leaving h, but I have no idea what to do with the top.
For these problems I need help finding the domain and range. I guess I don't really understand the range either.
what is the Domain and range?
2. f(x)=x^2+1 given the restriction -1<or equal x <or equal 5
The domain is [-1,5]
what is the range?
is there a simple way to figure this out?