2. Classify the following integrals, and compute the value of the convergent ones. +∞ (a) / +∞ dx 1+x2 (b) / 1 dx x lna (x) (c) / x³¯¯ 3 X x2 dx 2 +∞ (d) / 1 ex + e-x 1 dx (e) ex - 1 dx (f) 0 0 1 X 1 .2 sin 1 (#) a dx