Question

find the sum of - 12 - 8 - 4 + 0 + 4 equal to 20 terms


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Answer 1

-12-8=-20

-20-4=-24

0+4=4

-24+4=-20

because negative is greater than positive

Answer 2

Answer:

a=-12, n=5, d=4

Step-by-step explanation:

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

5/2(-24+16)=-20

Hope it will help you.....