English, asked by Tankion4211, 1 year ago

Find The Sum Of 20Term 2,7,12.....

Answers

Answered by akanshaarora27

1

Answer:

s=n/2(2a+(n-1)d)

s=20/2(2*2+(20-1)5)

=10(4+(19)5)

=990

Explanation:

s=?

a=2

d=7-2=5

using the sum formula

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