...[integrate] x*e^(3 lnx).
Please help me solve this problem.
We can't help until we can see where you're getting stuck. Assuming the exercise was something like this:
. . . . .\(\displaystyle \mbox{Integrate }\, \)\(\displaystyle \displaystyle \int\, x\, e^{3\, \ln(x)}\, dx\)
...what did you try first? How far did you get? Where did things bog down? For instance, you first applied a log rule (
here) to simplify (or condense) the exponent. Then you simplified the whole second factor by applying a special instance (not quite "cancelling", but close:
here) of "
The Relationship" between logs and exponentials. You then multiplied the two polynomial terms. (...all of which was just algebra.) Then you applied the Power Rule (
here) for integrals. And... then what?
When you reply, please include recent topics of study (u-substitution, numerical methods, etc), so we have a pretty good idea of what you're probably supposed to be doing. If this exercise came from a particular section in your textbook (rather than the chapter review or some other source), please include the topic of that section. Thank you!
