the sum of (-5)+(-8)+(-11)+___+(-230) will be (1) -8730 (2) -8830 (3) -8930
Answers
Answered by
2
Answer:
(3)-8930
Step-by-step explanation:
a=-5
d=-8-(-5)
=-8+5
=-3
an=-230
an=a+(n-1)d
-230= -5+(n-1)-3
-225=(n-1)-3
n-1= 75
n=76
Sn=n/2[a+an]
= 76/2[-5-230]
=38(-235)
=-8930
Option 3
Hope it's helpful!!!
Similar questions