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$ a+ b+ c= 0$

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Started By DOTOANNANG, 13-01-2018 - 16:21

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	Toán Trung học Cơ sở → Bất đẳng thức và cực trị → $3abc+\sum a\sqrt{\frac{b^{4}+c^{4}}{2}} \leq \sum a^{2}(b+c)$ Started by kakachjmz, 28-04-2024 thcs, hsg9, bđt		8 replies 1749 Views	$$3abc+\sum a\sqrt{\frac{b^{4}+c^{4}}{2}} \leq \sum a^{2}(b+c)$ - last post by ordinaryperson$ ordinaryperson 29-04-2024
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	Toán Trung học Cơ sở → Bất đẳng thức và cực trị → Tìm $Max, Min$ của $A = xy + yz + zx + \frac{x^{2}+y^{2}+z^{2}}{x+y+z}$ biết $3(x^2 + y^2 + z^2) + xy + yz + zx = 12$ Started by kakachjmz, 20-04-2024 hsg, bđt		2 replies 2471 Views	$Tìm $Max, Min$ của $A = xy + yz + zx + \frac{x^{2}+y^{2}+z^{2}}{x+y+z}$ biết $3(x^2 + y^2 + z^2) + xy + yz + zx = 12$ - last post by perfectstrong$ perfectstrong 23-04-2024
	Toán Trung học Cơ sở → Bất đẳng thức và cực trị → $M= \frac{1}{a^2 +4b^2 +2} + \frac{1}{4b^2+9c^2+2} + \frac{1}{9c^2+a^2+2}$ Started by katcong, 26-03-2024 bđt, toan 9, vao 10, cuc tri		8 replies 2556 Views	$$M= \frac{1}{a^2 +4b^2 +2} + \frac{1}{4b^2+9c^2+2} + \frac{1}{9c^2+a^2+2}$ - last post by ordinaryperson$ ordinaryperson 23-04-2024
	Toán Trung học Cơ sở → Bất đẳng thức và cực trị → Chứng minh $a+b+c\geq4\left(\frac{a}{bc}+\frac{b}{ca}+\frac{c}{ab}\right)+5$ Started by Leonguyen, 07-06-2023 bđt, bất đẳng thức		2 replies 668 Views	$Chứng minh $a+b+c\geq4\left(\frac{a}{bc}+\frac{b}{ca}+\frac{c}{ab}\right)+5$ - last post by HaiDangPham$ HaiDangPham 07-06-2023

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