Hi. Could someone please help me figure out this integral, which I am doing for extra practice. (I'm doing terribly on integrals overall, and hoping some extra practice will help.) I need to get the integral of this function:
x / sqrt (9 - x^2)
Because of the chapter this problem is in, I think it is solved working with u-substition and the integral of the natural logarithm function, but I can't seem to make it work.
Ah, and then (-1/2) * 2u^(1/2) = -u^(1/2) = -sqrt(9-x^2). It seems so simple now. I was expecting the logarithm aspect to be in the somehow... guess I over-fixated on it.
By the way, does MHF have a quick tutorial page / cheatsheet for that TEX graphics stuff you guys are all doing?