Math, asked by ramyavjrahul4367, 7 months ago

7+14+21+....+490, find the sum of series

Answers

Answered by xicacim193
2

Answer:

The given series is an arithmetic progression where

first term (a) = 7

Common difference (d) = 7

last term (l) = 490

Number of terms (n) = 490/7 = 70

Sum of an arithmetic progression = n (a + l)/2

= 70 (7 + 490)/2

= 35*497 = 17395

Therefore sum of the series/A.P is 17,395

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