find the
sum of 12 terms of
the series 5+9+13+.......
Answers
Answered by
1
Answer:
answer is 324
Step-by-step explanation:
S=n/2 (2a+(n-1)d)
S=12/2 (2×5+12-1×4
S=6 (10+44)
S=6 (54)
S=324
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