Math, asked by laxmi329, 1 year ago

find the sum of the series 3+ 7+11+.........…...... to 10 terms

Answers

Answered by 1Anonymus

3

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

here, a=3

d=4

Sn= 10/2 [2(3)+(9)4]

Sn=210

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