Question

Find the sum of the 50 greatest negative integers.

Answer 1

-1 + -2 + -3 + ....... + -50 =

Answer 2

I have to use arithmetic series.. and i don't get the question

Answer 3

-50(25) + -25 = -1275

Answer 4

which formula are you using?

Answer 5

Sn = n/2 [2a + (n-1)d]

Answer 6

n = 50 because there are 50 terms
a = -50 because my first term is -50
d = 1 because the difference between -50 and -49 is 1

Therefore,

Sn = (50/25)[2(-50 + (50 -1)(1)] = -1275