## suju101 Group Title ∫ab 3xdx evaluate using the method of summation. 2 years ago 2 years ago

1. agreene

$\int_b^a 3xdx$ is this the question?

2. suju101

yes

3. suju101

wait its b,a

4. agreene

int 3x dx = 3/2 x^2 +C evaluate in terms of a-b 3/2 a^2 - 3/2 b^2

5. suju101

|dw:1330414875053:dw|

6. agreene

$\int ^b_a 3xdx = \frac32 x^2 +c = \frac32 a^2-\frac32b^2+C$

7. suju101

but then what is the method of summation??

8. agreene

oh bleh, didnt read that part.. you'll have to use Riemann Sums, I honestly dont remember how to do them by hand anymore... if I ever need one I let my computers do it, lol. http://en.wikipedia.org/wiki/Riemann_sum