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March 1, 2015

Homework Help: Algebra/Number Theory

Posted by John Berkhamp on Tuesday, July 23, 2013 at 1:29pm.

In a sequence of four positive numbers, the first three are in geometric progression and the last three are in arithmetic progression. The first number is 12 and the last number is 452. The sum of the two middle numbers can be written as ab where a and b are coprime positive integers. Find a+b.

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