Q. 1 A5.0( 2 Votes )

# Find the sum of the following series.1 + 2 + 3 + …. + 45

Given that series S = 1 + 2 + 3 + 4 + 5… + 45, it has n = 45 terms and to find the sum S.

Formula for sum of first n numbers is

S =

45x23

= 1035

The sum S = 1 + 2 + 3 + … + 45 = 1035

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