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two integers, x and y have a product of 20. what is the least possible sum of x and y?
10 years ago

Answers

Steve
xy=20

x+y = x + 20/x

minimum occurs where x=2√5
(same as the problem for finding maximum area for a given perimeter: a square)

So, pick two integers near √20. They would be 4 and 5, with sum=9

The only other sums are

1+20=21
2+10=12
10 years ago

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