find the sum of the following APs.
(I) -37,-33,-29,.........,to 12 terms.
Answers
Answered by
1
Answer:
Sn = -180
Step-by-step explanation:
a= -37
n= 12
d= 4
now put these value in the formula of Sn
Sn= n/2[2a +(n-1)d]
Answered by
0
Answer:
-180
Step-by-step explanation:
Sn = n/2 [2a+( n-1) d]
Sn = 12/2 [ 2× (-37) + 11× 4]
Sn = 6[-74 + 44]
=> 6[-30]
=> -180
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