Math, asked by anujkumar840gmailcom, 9 months ago

Find the sum
of all multiples of 7 lying between 500 and 900.

Answers

Answered by rtrajan1254

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Answered by Kannan0017

Answer:

Sum = 39900

Step-by-step explanation:

Sum = n/2(X1+Xn)

First Term(X1) = 504

Last Term(Xn) = 896
Common Difference(d) = 7
Number of Terms(n) = [(Xn-X1)/d]+1 = [(896-504)/7]+1 = (392/7)+1 = 56+1 = 57

∴ S = (57/2)(504+896)

⇒ s = 28.5 × 1400 = 39900

∴ Sum = 39900

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Find the sumof all multiples of 7 lying between 500 and 900.​

Answers

Sum = 39900

Sum = n/2(X1+Xn)

∴ Sum = 39900

Find the sum
of all multiples of 7 lying between 500 and 900.