Question

find the sum of the first 20 terms: 1+ 1/2+ 1/4+ 1/8+...

Check my answer I got: 1

Answer 1

@Calcmathlete

Answer 2

Here's the formula.
\[S_n = \frac{a_1(1 - r^n)}{1 - r}\]

Answer 3

Check it once more.

Answer 4

\[\large S_n = \frac{(1)(1 - (\frac{1}{2})^{20})}{1 - \frac{1}{2}}\]

Answer 5

\[S_{20} = \frac{0.999}{0.5}\]

Answer 6

thx guys, I didnt reply early enough because my laptop died