If \(\lim_{n\rightarrow\infty}[(1+\frac{1}{n^{2}})(1+\frac{4}{n^{2}})(1+\frac{9}{n^{2}})\cdots(1+\frac{n^{2}}{n^{2}})]^{\frac{1}{n}}=ae^{b}\), then a+b=
Evaluate the integral: $$ I = \int \frac{2}{1 + x + x^2} \,dx. $$
\(\int\frac{2\cos 2x}{(1+\sin 2x)(1+\cos 2x)}dx=\)
Out of the first 5 consecutive natural numbers, if two different numbers x and y are chosen at random, then the probability that x4- y4 is divisible by 5 is: