I am using this formula: sqrt((f'(x))^2+((g'(x)^2)) dx...Is that right? Because I keep getting weird answers that are too big! HELP!!!!
Find the length of the curve defined by
from to .
What formula is that? It's a single function of a single variable. Where did you get two functions?
Let's see
. You should be able to do that.
I get
A quick look at the graph shows f(x) isn't far from straight on [5,8], so a rough estimate shows . I believe it.