1. ## Integration problem.

Lost as to how to do this.
Its not apparent if "Integration by parts" will work, or any substitutions. ((Came across this while working on differential equation problems, and half remembering learning how to do it before. So was hoping it wasn't too difficult))
$\displaystyle integral(2^xsinx)$

2. Originally Posted by Frggr
Lost as to how to do this.
Its not apparent if "Integration by parts" will work, or any substitutions. ((Came across this while working on differential equation problems, and half remembering learning how to do it before. So was hoping it wasn't too difficult))
$\displaystyle integral(2^xsinx)$
Did you try doing it by parts twice?

3. Originally Posted by Frggr
Lost as to how to do this.
Its not apparent if "Integration by parts" will work, or any substitutions. ((Came across this while working on differential equation problems, and half remembering learning how to do it before. So was hoping it wasn't too difficult))
$\displaystyle integral(2^xsinx)$
integration by parts ...

let $\displaystyle u = \sin{x}$ , $\displaystyle dv = 2^x \, dx$

you'll need to perform parts twice.

4. Heh thanks. Realized my mistake. -- couldn't figure out
$\displaystyle integral(2^x)dx = v$
that you could sub
$\displaystyle let u = 2^x => ln(u) = xln(2)$
$\displaystyle dx/du = 1/uln(2)$

etc.

Was trying to:
$\displaystyle ln(v) = ln(integral(2^x)dx) = integral(ln(2^x)dx)$
which is just downright wrong.