cho b>c. tìm max
$S=\frac{bc+a^2-b\sqrt{a^2+c^2}+c\sqrt{a^2+b^2}}{\sqrt{(a^2+b^2)(a^2+c^2)}}$
$S=\frac{bc+a^2-b\sqrt{a^2+c^2}+c\sqrt{a^2+b^2}}{\sqrt{(a^2+b^2)(a^2+c^2)}}$
Started By herolnq, 06-02-2014 - 21:22
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