Question

Knowing, that ( 1+2+3+.....+n={n(n+1)}/{2} ) find ( 1+2+3+......+135= )

Answer 1

The sum of numbers from 1 to 135 is 9180.

Step-by-step explanation:

To find the sum of numbers from 1 to n, we can use the formula:

sum = n(n + 1)/2

So, to find the sum from 1 to 135, we substitute n = 135 into the formula:

sum = 135(135 + 1)/2

After simplifying, we get:

sum = 135 * 136 / 2 = 9180