Find the sum of the first 21 terms of the arithmetic sequence 5, -2, -9.

asked May 2, 2021 111k views

1 vote

8.9k points

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6 votes

Answer:

-1365

Explanation:

The difference is -7, so you apply that to each number to get your answer.

Equality answered May 4, 2021

8.2k points

3 votes

the correct answer is idk for me

Sbordet answered May 6, 2021

7.7k points

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