what is the sum of natural numbers from 31 to 50
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Answered by
9
a(first term) =31
total numbers = 20 = n
common diffrence = 1 = d
the numbers from 31 to 50 are in ap
sum of n terms of ap = (an + n(n-1)d/2)
=> 31x20 + 20x19x1/2
=> 620 + 190
=> 810
Answered by
2
Answer:
40 correct answer
Step-by-step explanation:
beacouse there is 31 to 50 =20 number so, 810/20=40
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