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Decimals as Infinite Series 1

SVCALC-EBYWSJ

The infinite decimal:

$$0.1313131313\ldots$$

...corresponds to which of the following infinite series?

Select ALL that apply.

A

$\sum_{n=1}^\infty \cfrac{13}{10^n}$

B

$\sum_{n=1}^\infty \cfrac{2+(-1)^n}{10^n}$

C

$\sum_{n=1}^\infty \cfrac{2-(-1)^n}{10^n}$

D

$\sum_{n=1}^\infty \cfrac{3}{10^n}$

E

$\sum_{n=1}^\infty \cfrac{13}{10^{2n}}$