Math, asked by kushalrajbs553, 8 months ago

find the sum of all intepers from 21 to 70

Answers

Answered by preeti2818416

1

Answer:

n(n+1)/2 1 to 70- 1 to 20

Step-by-step explanation:

70*71/2- 20*21/2 ,35*71-10*21 ,. 2485-210,. 2275 ans.

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