Ushtrimi 4

Gjeni derivatin e secilit prej funksioneve të mëposhtme.

a) $\frac{x+1}{x-1}$

b) $\frac{\sin x}{x}$

c) $\frac{\sin x}{e^{x}}$

d) $\frac{x^{2}+1}{x+1}$

e) $\frac{\cos x}{\sin x}$

f) $\frac{\ln x}{x}$

g) $\frac{3}{\sin x}$

h) $\frac{x}{\cos x}$

i) $\frac{x^{2}}{1-\sqrt{x}}$

j) $\frac{x^{2}-3x+1}{\sqrt{x}}$

k) $\frac{e^{2x+3}}{x^{3}}$

l) $\frac{1+\sin x}{\cos x}$