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Question

If x, y, z > =, then find the value of xy + yz + zx.

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Solution

You can't simply find xy + yz + zx by knowing just x, y, z range.
You have to be given information about x+y+z and x2 + y2 + z2 for finding xy + yz + zx
If they are given then you can use the formula
(x + y + z)2 = x2 + y2 + z2 +2(xy + yz +zx)

However you can get the range of xy + yz + zx if the range of x, y, z are given.

So, as of now this question is wrong and doesn't have a solution.

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