Question

find the sum of first 100 natural numbers

Answer 1

step 1 address the formula, input parameters & values.
Input parameters & values:
The number series 1, 2, 3, 4, . . . . , 99, 100.
The first term a = 1
The common difference d = 1
Total number of terms n = 100

step 2 apply the input parameter values in the formula
Sum = n/2 x (a + Tn)
= 100/2 x (1 + 100)
= 10100/2
1 + 2 + 3 + 4 + . . . . + 99 + 100 = 5050

Therefore, 5050 is the sum of positive integers upto 100.

Answer 2

Use the formula-

n(n+1)/2… answer 'll be 5050.