Find the sum of the first 8 multiples of 3
Asked by admin @ in Math viewed by 338 People
Find the sum of first eight multiples of 3
Asked by admin @ in Math viewed by 338 People
Find the sum of first eight multiples of 3
Answered by admin @
The first 8 multiples of 3 are : 3, 6, 9, 12, 15, 18, 21, 24
Number of terms = 8
The first term = a1 = 3
The last term = a8 = 24
Find the sum:
Sn = n/2 ( a1 + an)
S8 = 8/2 (3 + 24)
S8 = 108
Answer: The sum of the first 8 multiples of 3 is 108.
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