`3sqrt{x-3} - sqrt{x+5}=2x-8`
`1/(2√2)+1/(4√3)+1/(6√6)+....+1/(2n.sqrt{n+1})+1/sqrt{n+1} >1`
Cho `x,y,z>0;xyz=1`
Min `P=(x+1347)/(x^3(y+z)) +(y+1347)/(y^3(x+z))+(z+1347)/(z^3(x+y))`
Loga
Sinh Học lớp 12
