find the sum of first 14 terms of the sequence -3,3,9,15.......
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Answered by
1
Answer:
use this formula it will help you
Step-by-step explanation:
try your self
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Answered by
2
Answer:
504
Step-by-step explanation:
Sn=n/2[2a+(n-1)d]
Sn=14/2[2×(-3)+13×6]
Sn=7×72
Sn=504
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