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Martin R
9:57 PM
Prove $\frac{1}{ab}+\frac{1}{cd}\geq \frac{1}2 (a^2+b^2+c^2+d^2)$
has an exact duplicate question here:
Prove that $\frac{1}{ab}+\frac{1}{cd} \geq \frac{a^2+b^2+c^2+d^2}{2}$
.
I just wonder why my
search with Approach0
did not find that (at least not on the first result pages). Or did I overlook something?
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