$\frac{x^4yz}{y^4(3xz+2y^2)}+\frac{xy^4z}{z^4(3xy+2z^2)}+\frac{xyz^4}{x^4(2yz+2x^2)}$
min với x, y, z dương
29-08-2018 - 22:13
$\frac{x^4yz}{y^4(3xz+2y^2)}+\frac{xy^4z}{z^4(3xy+2z^2)}+\frac{xyz^4}{x^4(2yz+2x^2)}$
min với x, y, z dương
19-05-2018 - 22:37
Cho x,y dương tm $x^2y+x+1\leq y$
tim max
$P=\frac{xy}{(x+y)^2}$
07-05-2018 - 23:05
Cho a,b,c>0; abc=1
tìm min
$\sqrt{\frac{a}{b+9}}+\sqrt{\frac{b}{c+9}}+\sqrt{\frac{c}{a+9}}$
04-05-2018 - 21:26
Cho a,b,c>0 , a+b+c=6
CMR:
$(a^2+2)(b^2+2)(c^2+2)\leq 216$
04-05-2018 - 20:11
Cho a,b,c>0 ; a+b+c=1
Tìm min
$a^2+b^2+c^2+\frac{9abc}{2}$
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