2 years ago

The sum of the first 21 terms of the progression, - 18, - 15,-12.....is?

Mathematics

1 answer:

katovenus [111]2 years ago

8 0

You can just use the tn formula to solve this tn= t1 + (n-1)d

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The sum of the first 21 terms of the progression, - 18, - 15,-12.....is?​

The sum of the first 21 terms of the progression, - 18, - 15,-12.....is?