Question

Find the sum of all odd numbers from 344 to 577

Answer 1

odd nos. between 344 to 577 are 345,347......577
a=345 d=2 an=577
a+(n-1) d=an
345+(n-1) 2=577
(n-1) 2=232
n-1=116
n=117
Sn=117/2{2×345+(117-1) 2}
117/2(690+232)
117/2×922
53937

Answer 2

Hope my answer will help you

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