Math, asked by ramanyadav812817, 9 months ago

Find the sum of multiple of 7 between 10 to 1000.

Answers

Answered by swetha1981sai

1

Step-by-step explanation:

first multiple is 14

next 21,28,35,42,.........….... to994

an=994

an=a+(n-1)d

994=14+7n-7

987=7n

n=141

sn=141/2(28+980)

sn=71,064

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