I need help bad. I just can't seem to get these problems. Any help would be greatly appreciated.
1. a)Find the intervals on which f is increasing or decreasin
b)Find the local maximum and minimum values of f
c)Find the intervals of concavity and the inflection points
f(x)=(x^2) / ((x^2) + 3)
2.Find the limit using l'Hospital's rule where appropriate unless it's easier another way.
lim (as tapproaches 0) ((e^3t)-1) / t
3.^^^Same as 2^^^
lim (as x approaches infinity) (xe^(1/x)) - x