(根号x-1)+(根号2x-3)+(根号3x-5)+(根号4x-7)=5x-6

问题描述:

(根号x-1)+(根号2x-3)+(根号3x-5)+(根号4x-7)=5x-6

X-1>=0 X>=1 2X-3>=0 X>=3/2
3X-5>=0 X>=5/3 4X-7>=0 X>=7/4
5X-6>=0 X>=6/5
综合得X>=7/4
观察可得X=2