4 years ago

Need some help, thanks :)

Mathematics

1 answer:

Ira Lisetskai [31]4 years ago

7 0

7 is equal to x, so yeah

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MissTica

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
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