Math, asked by ashutosh4168, 11 months ago

21+22+23+.....+60 find the sum

Answers

Answered by QueenOfKnowledge

7

Totally there are 40 terms

S40 = 40/2 [ (2×21) + (39 ×1)

= 20 ( 42 + 39)

= 20× 81

= 1620

Therefore,sum = 1620.

ashutosh4168: your answer is wrong

QueenOfKnowledge: now?

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