Recent content by rayray19

Homework Statement the antiderivative of (-4x)/(x^2 + 3) dx Homework Equations The Attempt at a Solution i got -2+c is that right at all, if not can somebody help me

antiderivative of 4rsqrt(8-r)dr my answer is... (8/5)(8-r)^(5/2) - (64/3)(8-r)^(3/2) + ccan any1 tell me if this is correct

yea i don't even no where the 9.24 came from.. so i do it from x=0 to x=1 and what is the top and bottom values??

ok so now how do i get started with that

now i got up to 4 times antiderivative of (8-u)sqrt(u)) -du right?

they intersect at x = 9.24?

thank yo u so muchh, I am working on a problem now antiderivative of 4rsqrt(8-r)dr so the u is 8-r and the du is -1dr right

i think i have it,, (1/3)ln(t^3 + 6t + 3) ?

yea it becomes 1/x doesn't iit

Homework Statement y = x^5 - 2ln(x+5) and y = x^3 - 2ln(x+5) Homework Equations The Attempt at a Solution i put it ont he calculator but i honestly don't even no where the spot that i amtrying to find the area for is

so is the answer (1/3)((t^2)+2) +c ?

im sorry I am stuck, what do i do after i find the du=3((t^2) +2)) dt

i got 3 times the antiderivative of du/u dt.. i don't think that's right though

i factored out a 3 but now I am lost at finishing it up

for my answer to #2 i got (1/3)((r^2)+2)^(3/2) + cis that correct??