SOLUTION: a3*a8=300 Sn=128

Question 388118: a3*a8=300 Sn=128
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
What kind of sequence is this? (Arithmetic, geometric, harmonic, ...?)
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From the given (a+2d)(a+7d) = 300. From the second info, we get . Three variables, two equations. Hmm. Since you chose not to give the value of n, I think you know the solution to the problem yourself. So I don't need to continue any further.
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