# Generalizing the relation between H(x), F(x) and G(x)

1. Apr 8, 2015

### andyrk

If $H(x)= \int_c^x h(x)dx$ and $H(a) = F(a) - G(a) = \int_c^a h(x)dx$ and $H(b) = F(b) - G(b) = \int_c^b h(x)dx$, then does that mean $H(x) = F(x) - G(x)$? Is the information provided sufficient enough to come to that conclusion?

2. Apr 8, 2015

### Simon Bridge

Can you come up with a sample F and G so that H=F-G holds for x=a and x=b but does not hold in general?

3. Apr 8, 2015

### andyrk

No, H = F-G holds only for x = a and x = b. There isn't any information for any x other than a or b.

4. Apr 8, 2015

### Simon Bridge

Then you seem to have answered your own question.

5. Apr 8, 2015

### andyrk

Haha..yeah..I think I have,