What is the derivative of f(t)=tt+2f(t) = \frac{t}{t+2}f(t)=t+2t?
1(t+2)2\frac{1}{(t+2)^2}(t+2)21
2(t+2)2\frac{2}{(t+2)^2}(t+2)22
t+2−t(t+2)2\frac{t+2-t}{(t+2)^2}(t+2)2t+2−t
Both b and c