Urgent: Integral Homework Help

[Wesley Williams]

The following are integration by parts problems I have to do for homework but don't understand. I need to finish all of them by 6:00 PST, so if you can help post asap please ;) And don't just give the answer, please explain your method so that I can figure out what I did wrong.

26)

34)

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[eboyblue10]

[Oasis]

http://www.integral-calculator.com/

Shows you steps. Don't get in the habit of using it though.

[Wesley Williams]

http://www.integral-calculator.com/

Shows you steps. Don't get in the habit of using it though.

I've actually been using that exact website- it gave me the wrong answers for these problems.

[Oasis]

I've actually been using that exact website- it gave me the wrong answers for these problems.

Either A: you input them incorrectly into the calculator or into your homework software, or B: integral calculus has been revolutionized by your math professor/teacher and this calculator is out of date.

Try again, hell I'll even input one for ya.

[Kimon²]

there should be a homework help megathread

it would probably die over the summer but still

[Oasis]

http://www.integral-calculator.com/#expr=t%5E2ln%283x%29&ubound=10&lbound=4

That's 25. I haven't done integrals for a year or two, so you'll have to input it to tell me if its right.

I'll reiterate though, figure out how its done, and do it yourself. You do not want to become reliant on this stuff because you will fail tests.

[Kishgal]

Haha, I never learned this stuff.

[Blockzillahead]

I would but I know nothing about integral
not yet at least

[Wesley Williams]

I'll reiterate though, figure out how its done, and do it yourself. You do not want to become reliant on this stuff because you will fail tests.

I've experienced this; in AP Calc I basically just copied Hotmath all day long.

Also I just noticed the integration bounds thing, that might help me not mess up in the calculator :P

[Oasis]

I've experienced this; in AP Calc I basically just copied Hotmath all day long.

I did a stuff job on the AP Calc test because I was complacent in the idea that I knew enough Calculus to get me through the class.

Now I'm paying for it in college, quite literally, lol.

[Wesley Williams]

I did terribly on the AP (somehow got a 3) but then decided to really get down to business because my grade was hovering around the B-/C+ range, and I ended up getting a 100% on my calculus final. But it seems like I forgot a lot about integration over the long summer break.

Sadly, I kind of resent this work because I won't be needing any of this knowledge for my Comp Sci degree. I wish I could be all excited about math like the physics majors and whatnot but that's life.

[Aide33]

Calculus is so fun, I wish I could help you but I'm reading a book on this and I haven't gotten past derivation yet.

[Wesley Williams]

Calculus is so fun, I wish I could help you but I'm reading a book on this and I haven't gotten past derivation yet.

Haha have fun ;)

For some reason this calculation for 18 is giving me the wrong result. My own efforts at integration by parts have also failed :(
I tried using u=y and dv=(y+8)^(1/4)
I am an idiot. Kept using x in the answer instead of y

Just fixed one by changing the placement of a parenthesis and another by adding a +C. Why do you do this to me, calculus homework?