(o) find the sum of first23 even natural numbers .
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The below workout with step by step calculation shows how to find what is the sum of natural numbers or positive integers from 1 to 23 by applying arithmetic progression. It's one of an easiest methods to quickly find the sum of any given number series.
step 1 address the formula, input parameters & values.
Input parameters & values:
The number series 1, 2, 3, 4, . . . . , 22, 23.
The first term a = 1
The common difference d = 1
Total number of terms n = 23
step 2 apply the input parameter values in the formula
Sum = n/2 x (a + Tn)
= 23/2 x (1 + 23)
= 552/2
1 + 2 + 3 + 4 + . . . . + 22 + 23 = 276
Therefore, 276 is the sum of positive integers upto 23.
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