Question

12. What is the sum of first seven negative integers?
2)​

Answer 1

Answer:

Step-by-step explanation:

-1-2-3-4-5-6-7

= -10-18

= -28

Hope, it helpful for u

Answer 2

Answer:

Here a = -7 and l = -1 and n=7so

Sn = 7/2(-7-1) = 7 × -4 = -28