Question

The sum of all the integers from -714 to 784 is??

Answer 1

The sum of all integers is 52430

Explanation:

n = 714 + 784 = 1498

a1 = -714, an = 784

Sn = n/2 x (a1 + an) = 1498/2 x (-714 + 784) = 749 x 70 = 52430.