Proving an inequality?
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Q. ➡️Proving an inequality?
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Proving Algebraic Inequalities. If x and y are positive real numbers then clearly the sum x/y + y/x is greater than or equal to 2, because the quantity x/y + y/x - 2 can be multiplied through by xy (which is positive if x and y are both positive) to give x2 + y2 - 2xy, which can also be written as (x-y)2.
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