x2+2/根号x2+1与x2+5/根号x2+4 哪个最小值为2
x2+2/根号x2+1的最小值为2,当x=0时
∵x2+5/根号x2+4 =2时
得x²+3=0(无实数解)x²+3=0(无实数解)如何求得 过程令x2+5/根号x2+4 =2(两边平方)
x4+10x2+25=4x2+16
x4+6x2+9=0
(x2+3)²=0