Find the sum of first 14 term of sequence -3,3,9,15,....
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Answered by
14
Answer:
where a = first term, d = difference and n= number of terms
Step-by-step explanation:
Sn = n/2 (2a+(n-1)d)
here, n= 14, a = -3, d = 6
S₁₄= 14/2 (2 (-3) + (14-1) (6) )
=7 (72) = 504
hence, the 14th term is 504
Answered by
3
Answer:
answer : 504
l = a + (n-1) d
s n is equal to N divided by 2 (A + L )
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