Question $11$

$1$ p

Estimate error made by using the partial sum $S_4$ as an approximation to the sum $S$ of the entire series.

${\displaystyle \underset{n=1}{\overset{}{}}}\frac{(-1{)}^{n1}(0\mathrm{.}2{)}^n}{n}$

$3\mathrm{.}20{10}^{-4}$

None of the other choices

$4\mathrm{.}00{10}^{-4}$

$6\mathrm{.}40{10}^{-5}$

$1\mathrm{.}07{10}^{-5}$