Question

find the first 5 natual number without addition

Answer 1

$\large\bf{\underline\green{☕︎Good \: Morning☕︎}}$

Step 1 :- address the formula, input parameters & values.

Input parameters & values:

The number series 1, 2, 3, 4, 5.

The first term a = 1

The common difference d = 1

Total number of terms n = 5

Step 2 :- apply the input parameter values in the formula

Sum = n/2 x (a + Tn)

= 5/2 x (1 + 5)

= 30/2

1 + 2 + 3 + 4 + 5 = 15

Therefore, 15 is the sum of positive integers upto 5.

Answer 2

Step 1 :- address the formula, input parameters & values.

Input parameters & values:

The number series 1, 2, 3, 4, 5.

The first term a = 1

The common difference d = 1

Total number of terms n = 5

Step 2 :- apply the input parameter values in the formula

Sum = n/2 x (a + Tn)

= 5/2 x (1 + 5)

= 30/2

1 + 2 + 3 + 4 + 5 = 15

Therefore, 15 is the sum of positive integers upto 5.