Math, asked by sfgn6471, 9 months ago

Find the sum of first 10 termsof an AP :31,26,21,16

Answers

Answered by bsrsyamala

0

Answer:

85

Step-by-step explanation:

Sn=n/2[2a+(n-1)d]

=10/2[2(31)+(10-1)-5]

=5[62-45]

=85

d is -5 because 26-35=-5

Hope it helps

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