Maclaurin series of sin x is _____.
∑n=0∞ x2n+1(2n+1)!
∑n=0∞ (-1)nx2n+1(2n+1)!
∑n=0∞ x2n(2n)!
∑n=0∞ (-1)nx2n(2n)!
Option (b)
The sum of the series ∑n=1∞12n is_____.
0
1
-1
12