I think I'm following you've if 4-root(y) means y1/4. Regardless that doesn't look right? Thanks for the interest though :). We should be able to get a concrete answer like 16ln2 or something if i remember correctly!
no its (ln2)^4 not ln2^4=4ln2 solving this I believe involves setting it equal to σ or some variable and then exponentiating using e. Although I could be completely wrong. I know this can be simplified and solve because my professor did it in class, I just can't find my notes from that day.
Homework Statement
Im trying to simply (lnx)^n say (ln2)^3
Homework Equations
?
The Attempt at a Solution
Im lost on this one I can't find any information. All info I'm finding is dilute because of similar search terms.
Please, and thanks!
Yeah I can see it but my answer didn't match up with what Wolfram gave.
they gave 1/13 e^(3 x) (3 cos(2 x)+2 sin(2 x))
And what am I missing why do your equations look so much...prettier?
y=∫e3xcos(2x)dx where u=e3x du=3e3x & v=(1/2)sin(2x) dv=cos(2x)
After integrating by parts twice i get this
y=e3xsin(2x)/2 - e3xsin(2x)/2 +sin2xe3x/2 -∫e3xcos(2x)dx
the 2nd time I integrated by parts it was
u=sin2x du=2cos(2x)
v=(1/3)e3x dv=e3x
Homework Statement
Integrate By Parts (i.e. not using formulas)
∫e3xcos(2x)dx
The Attempt at a Solution
I keep going around in circles, I know at some point I should be able to subtract the original integral across the = and then divide out the coefficient and that's the final...
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