已知正数x、y、z满足x+y+z=1，则1x+4y+9z

已知正数x，y，z满足x+2y+3z=1，则1x+2y 设正数xyz满足2x+3y+4z=9,则1/x+y +4/2y+z +9/3z+x最小值 已知x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求代数式x2/(y+z)+y2/(x+z)+z2/ 已知实数x,y,z满足x/(y+z)+y/(z+x)+z/(x+y)=1,求x2/(y+z)+y2/(z+x)+z2/( 已知正数xyz,满足x+y+z=xyz 已知正数x,y,z满足x+y+z=xyz,且不等式1/x+y+1/y+z+1/z 已知x、y、z满足|4x-4y+1|+152y+z+(z−12) 已知正数x,y,z满足5x+4y+3z=10 已知正数x+y+z=1,求4^x+4^y+4^z的最小值 1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值. 用柯西不等式证明：设正数x,y,z,满足x+y+z=1,求证:1/x+4/y+9/z≥36 已知正数x.y.z满足x+y+z=1,求证：(1):(1/x-1)(1/y-1)(1/z-1)大于等于8;(2):1/x 已知X、Y、Z满足2X-Y+4Z=8(1);X-2Y-Z=7(2)求X-Y-Z的值