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The sum of the squares of the first and fourth terms of an arithmetic progression is 200, while the sum of the squares of the second and third terms is 136.  Find the product of these four terms.

 Dec 14, 2019
 #1
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Finding the arithmetic sequence which is 2, 6, 10, 14. The product of the 4 terms are 1680.

 Dec 14, 2019
 #2
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Where is your working?

Melody  Dec 14, 2019

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