Cho x,y,z la cac so duong thoa man dieu kien x+y+z > hoac = 12

GTNN: P =\(\dfrac{x}{\sqrt{y}}+\dfrac{y}{\sqrt{z}}+\dfrac{z}{\sqrt{x}}\)

y=(3m-2)x -2m

a> Xac dinh m tai diem co hoanh do =2

b> Xac dinh m de do thi ham so cat truc tung tai diem co tung do =2

c> Xac dinh toa do giao diem cua 2 do thi vs m tim duoc o 2 cau a va b

Cho tam giac nhon ABC co goc B =a , goc C= b va BC =c

Tinh dien tich tam giac ABC theo a , b,c

P =\(\dfrac{\sqrt{y-2}}{y}\)

tim GTLN cua P

Cho x>0 ,y>0 thoa man dieu kien \(\dfrac{1}{x}+\dfrac{1}{y}=\dfrac{1}{2}\)

Tim GTNN cua \(\sqrt{x}+\sqrt{y}\)

Cho 0<x<2

Tim GTNN A=\(\dfrac{9x}{2-x}+\dfrac{2}{x}\)