问题
填空题
已知0<x<4,则
|
答案
+4 x
=1 4-x
(x+(4-x) 4
+4 x
)=1+1 4-x
+x 4(4-x)
+4-x x
≥1 4
+25 4
=1 4 9 4
当且仅当
=x 4(4-x)
时,即x=4-x x
时取等号.8 3
故答案为:9 4
已知0<x<4,则
|
+4 x
=1 4-x
(x+(4-x) 4
+4 x
)=1+1 4-x
+x 4(4-x)
+4-x x
≥1 4
+25 4
=1 4 9 4
当且仅当
=x 4(4-x)
时,即x=4-x x
时取等号.8 3
故答案为:9 4