- Thu Jun 18, 2009 8:22 pm
- Forum: Discrete Math
- Topic: Sequences: sum of 1st 2 terms is 18, sum of 1st 4 is 52
- Replies:
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Well i am now totally lost... I want so to solve this maths problem on my own but i have no idea how to solve it... I can solve it the long way but how can i do it quicker? The sum of the first two terms of an arithmetic progression is 18 and the sum of the first four terms is 52. find the sum of th...