Math Question
![5. Use the formula to evaluate the series \( 1-2+4-8+\ldots-a_{10} \)
\[
S_{n}=\frac{a_{1}\left(1-r^{n}\right)}{1-r}
\]
In the formula for a finite series, \( a_{1} \) is the first term, \( r \) is the common ratio, and \( n \) is the number of terms.
1023
\( -341 \)
\( -1023 \)](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/4/9/6997ecd8-970c-4f4e-a8da-554d53dc474c.png "5. Use the formula to evaluate the series \( 1-2+4-8+\ldots-a_{10} \)
\[
S_{n}=\frac{a_{1}\left(1-r^{n}\right)}{1-r}
\]
In the formula for a finite series, \( a_{1} \) is the first term, \( r \) is the common ratio, and \( n \) is the number of terms.
1023
\( -341 \)
\( -1023 \)")
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