ä¾Cauchyä¸çå¼å¾
6ï¼x^2+y^2+z^2
ï¼x^2/1+(2y)^2/4+z^2/1
â¥(x+2y+z)^2/(1+4+1)
â(x+2y+z)^2â¤36
â´0<x+2y+zâ¤6.
åçæ¶ï¼
x/1ï¼y/2ï¼z/1ä¸x+2y+zï¼6
å³xï¼zï¼1,yï¼2.
â´xï¼zï¼1, yï¼2æ¶ï¼
ææ±æ大å¼ä¸ºï¼6ã
温馨提示:答案为网友推荐,仅供参考