2010-03-11, 10:09 PM
2147483647 Wrote:I'm a bit lost here.
lim f(g(x)) as x approaches c = f( lim (g(x))) as x approaches c.
This is true, because f and g are functions. If f is the function "add this number an infinite amount of times", then it has to be defined through a limit:
![[Image: yg4zxmm.png]](http://mathurl.com/yg4zxmm.png)
If g is 1/x, then:
![[Image: ygve786.png]](http://mathurl.com/ygve786.png)
![[Image: yajqnhj.png]](http://mathurl.com/yajqnhj.png)
The problem here is that you think you can evaluate both limits at the same time. You can't. Keep in mind that having variables inside a limit is not allowed: If you're going to do that, then use differentiation instead:
![[Image: y8opgoh.png]](http://mathurl.com/y8opgoh.png)
Noah

