If $|a_n| < 10^{-n}$, prove that $\sum^{\infty}_{n=1} a_n$ converges.
Could someone give me a hint as to how to start this?
If $|a_n| < 10^{-n}$, prove that $\sum^{\infty}_{n=1} a_n$ converges.
Could someone give me a hint as to how to start this?