find the sum of ap -37,-33,-29.....to 12 term
Answers
Answered by
19
Answer:
-180
Step-by-step explanation:
by using the formula of Sn
n/2 (2a+(n-1)d)
n=12
a=-37
d=4
put the value of n,a and d in formula
12/2 (2×-37 +(12-1)4)
= 6(-74 + 44)
= 6(-30)
=-180
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Answered by
8
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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