MATHEMATICS
JAMB 2005 - Question 20
Mathematics 2005 JAMB Past Questions - Question 20: Find the sum of the first 20 terms of the series 8,12,16,..........96
A:
B:
C:
D:
Correct Answer
B
Explanation
To find the sum of the first 20 terms of the series 8, 12, 16, ..., 96, we can use the formula for the sum of an arithmetic series:Sum = (n/2)(first term + last term)In this case, the first term is 8 and the last term is 96. The common difference can be found by subtracting the first term from the second term:Common difference = 12 - 8 = 4Now we can substitute these values into the formula:Sum = (20/2)(8 + 96)Simplifying further:Sum = 10(104)Sum = 1040Therefore, the sum of the first 20 terms of the series is 1040.
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