先找规律,再求x的值.(9,3)=12,(7,5)=4,(10,3)=14,(2/3,1/4)=5/6,计算:(1/2,x)=2/5

问题描述:

先找规律,再求x的值.(9,3)=12,(7,5)=4,(10,3)=14,(2/3,1/4)=5/6,计算:(1/2,x)=2/5

(9-3)*2=12
(7-5)*2=4
(10-3)*2=14
(2/3-1/4)*2=5/6
(1/2-x)*2=2/5
x=3/10