3 years ago

☝☝and the sum too? Please help

1 answer:

7 0

Answer:

There should ten terms in the series

Step-by-step explanation:

The number on top of the sigma symbol represents the number of terms in the series.

True answer:

-2+1+4+...22+25= 115

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Zepler [3.9K]

geometric sequence

$\tt U_n=ar^{n-1}$

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Rasek [7]

You can't the answer is 2 because 20 goes into 10 twice

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