SOLUTION: Hi eberyone, I was wondering if anyone could show me how to solve the following problem; Given f(x) = x^2 + 1 find f(-1) If someone could show me how to solve this problem with s

Algebra ->  Functions -> SOLUTION: Hi eberyone, I was wondering if anyone could show me how to solve the following problem; Given f(x) = x^2 + 1 find f(-1) If someone could show me how to solve this problem with s      Log On


   

Question 204325: Hi eberyone, I was wondering if anyone could show me how to solve the following problem;
Given f(x) = x^2 + 1 find f(-1)
If someone could show me how to solve this problem with steps and explanations that would be really handy.
I have another similiar one also which is; Given f(x) = x^2 +1 find f(x+h) and expand.
Any help with either problem would be awesome.
Thnaks, -Nick.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Find: f%28-1%29 if:
f%28x%29+=+x%5E2%2B1 Substitute -1 for x.
f%28-1%29+=+%28-1%29%5E2%2B1
f%28-1%29+=+1%2B1
highlight%28f%28-1%29+=+2%29
Find f%28x%2Bh%29 if:
f%28x%29+=+x%5E2%2B1 Substitute (x+h) for x.
f%28x%2Bh%29+=+%28x%2Bh%29%5E2%2B1 Expand.
highlight_green%28f%28x%2Bh%29+=+x%5E2%2B2xh%2Bh%5E2%2B1%29