it is a true or false question

11. If a = 839 and y(0) = 1, then y = J'n,(e 1 + ex). 2 3x2 . 55 12. The length of the curve 3; = Er, from r, = 0 to m = 8 13 E. 00 (_1)n+1.2n+1 13. The exact value of the series 2 n=0 22n+1[(2n+ 1)!] is _1