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OpenStudy (anonymous):
Given the arithmetic sequence 23, 17, 11 …,evaluate
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OpenStudy (anonymous):
OpenStudy (inkyvoyd):
you want to sum the 4 term to the ninth term of that arithmetic series.
hartnn (hartnn):
do u know how to find the sum of 'n' terms of arithmetic series ?
OpenStudy (anonymous):
use an=a1+(n-1)d d as common differnce 17-23=11-17=-6....
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