Math, asked by Taris50, 7 months ago

The 8th term of an arithmetic sequence is 40. Calculate the sum of the first 5 terms

Answers

Answered by meenurana8696

0

Step-by-step explanation:

given that a8=40

a+7d=40.......…(1)

s5= 5/2 (2a+4d)

=5/2(80-14d+4d)

=5/2(80-10d)

=5(40-5d)

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