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23-10-2020
Mathematics

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Is the sequence arthmetic: 17, 9, 1, -7

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RedDoraGon RedDoraGon

23-10-2020

Answer:S(40)=(40/2)(2*17+[40-1]4)

=(20)(34+39*4)

=(20)34+156)

=(20)(190)

=3800, D.

Step-by-step explanation:

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