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What is the largest number?
HELP! MATH HELP! IT IS VERY MUCH APPRECIATED. Arithmetic Sequence.?
2016-04-19 4:05 pm
Assuming that the ratio of the sum of the first n terms of two arithmetic series is 2n + 9 : 6n + 1, what is the ratio of their corresponding eight terms?
回答 (1)
2016-04-19 5:39 pm
✔ 最佳答案
The ratio of their corresponding eight terms= The ratio of the sum of the first 15 terms of two arithmetic series
= 2(15) + 9 : 6(15) + 1
= 39 : 91
= 3 : 7
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