ericj2102 ericj2102

10-04-2020
Mathematics

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

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jdksjjenroeijej jdksjjenroeijej

10-04-2020

the correct answer is idk for me

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lilboi999 lilboi999

10-04-2020

Answer:

-1365

Step-by-step explanation:

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

Answer Link

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