M
meomiutiunghiu


Chứng minh :
$\sqrt{2} + \sqrt{6} + \sqrt{12} + \sqrt{20} + \sqrt{30} + \sqrt{42} < 24$
$\sqrt{2} + \sqrt{6} + \sqrt{12} + \sqrt{20} + \sqrt{30} + \sqrt{42} < 24$
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