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Brainy boy
Questions (1)
The 10th and 15th terms of an AP are -5 and -7 1/2 respectively.What is the sum of the first 20 terms?[WAEC]
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Answers (2)
Solve this:The first term of an AP is 6 and the fifth term is 18. Find the number of terms in the series having a sum of 162
The first term of an AP is 6 and the fifth term is 18. Find the number of terms in the series having a sum of 162 solve it