Arithmetic string equal to the geometric string, count x

Arithmetic and Geometric progressions.

Arithmetic string equal to the geometric string, count x

Postby ghostfirefox » Thu Nov 21, 2019 11:50 am

Let x1, ..., x25 be such positive integers that x1⋅x2⋅ ... ⋅x25 = x1 + x2 + ... + x25. What is the maximum possible value of the largest of numbers x1, x2, ..., x25?
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Re: Arithmetic string equal to the geometric string, count x

Postby HallsofIvy » Mon Sep 07, 2020 4:23 pm

What exactly do you mean by "x1- x2...- x25? Am I correct that each term after the first is subtracted and this is NOT an alternating sum? If so then you have x1- (x2+ ...+ x25)= x1+ (x2+ ...+ x25) so that -(x2+ ...+ x25)= X2+ ...+ X25 and then 2(x2+ ...+ x25)= 0 so x2+ ...+ x25= 0. There is NO "largest possible value" since, if x2+ ...+ x25= 0, x1 can be any number at all.

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