Calc Question on Integrals

[AgaBoogaBoo]

I have to find the indefinite integral of (lnx)^2/x*dx

I just need someone to tell me what the basic way of solving this will be, I'm not sure if a substitution of any kind of will help.

 

[AgaBoogaBoo]

whoa, AT is pretty active tonight - I posted and a few minutes later it's at the bottom of my screen :Q

 

[Goosemaster]

try subsitution and post your results😀

c "u" later😀

 

[bersl2]

Originally posted by: Goosemaster
try subsitution and post your results😀

c "u" later😀

:laugh:

 

[chuckywang]

ln(x)^3/3 +C

 

[AgaBoogaBoo]

Originally posted by: chuckywang
ln(x)^3/3 +C

Right, but how? If substitution, what should I be substituting?

Sorry if I'm missing something obvious, have 4 tests tomorrow and about 5 more hours left in this all nighter.

 

[bleeb]

This question is too easy for a reply... keep trying to figure it out buddy~

 

[AgaBoogaBoo]

omfg nevermind, it all makes sense now 😛

edit: no it doesn't, I've just confused myself

 

[JLGatsby]

Calc won't make you rich.

 

[AgaBoogaBoo]

Originally posted by: JLGatsby
Calc won't make you rich.

never said it would 😛

 

[chuckywang]

let u = ln(x), then du = 1/x dx

 

[davidsi]

buy a ti-89. hahaha thast how i learned how to do calculus. itll even let u use variables liek xyz and solve it for u!

 

[TheoPetro]

Originally posted by: davidsi
buy a ti-89. hahaha thast how i learned how to do calculus. itll even let u use variables liek xyz and solve it for u!

im in my final semester of calc and i just picked one up. my Bs DEFINETLY would have turned to As if i had this thing in calc 1 and 2. heres to hopen it helps in ODE and PDE

 

[Syringer]

Originally posted by: chuckywang
let u = ln(x), then du = 1/x dx

FTW :thumbsup:

 

[manlymatt83]

Originally posted by: TheoPetro

Originally posted by: davidsi
buy a ti-89. hahaha thast how i learned how to do calculus. itll even let u use variables liek xyz and solve it for u!

im in my final semester of calc and i just picked one up. my Bs DEFINETLY would have turned to As if i had this thing in calc 1 and 2. heres to hopen it helps in ODE and PDE

Whats so good about the TI89's? I'm failing Calc II and I need a 51% to graduate...

 

[AgaBoogaBoo]

Originally posted by: davidsi
buy a ti-89. hahaha thast how i learned how to do calculus. itll even let u use variables liek xyz and solve it for u!

I have one, but still need to learn the material.

Question - how can I differentiate with bases other than e in the calculator?

 

[Gerbil333]

Originally posted by: mjuszczak

Originally posted by: TheoPetro

Originally posted by: davidsi
buy a ti-89. hahaha thast how i learned how to do calculus. itll even let u use variables liek xyz and solve it for u!

im in my final semester of calc and i just picked one up. my Bs DEFINETLY would have turned to As if i had this thing in calc 1 and 2. heres to hopen it helps in ODE and PDE

Whats so good about the TI89's? I'm failing Calc II and I need a 51% to graduate...

They can do integrals and derivatives. It's saved me a few points here and there.

 

[Syringer]

Originally posted by: AgaBoogaBoo

Originally posted by: davidsi
buy a ti-89. hahaha thast how i learned how to do calculus. itll even let u use variables liek xyz and solve it for u!

I have one, but still need to learn the material.

Question - how can I differentiate with bases other than e in the calculator?

If you want base 5..ln(x)/ln(5)