17.18计算17.18计算
17.18计算
17.原式=3√3-2×√3/2+8-(√3-1)=3√3-√3+8-√3+1=√3+918. x²-x=0x(x-1)=0x1=0,x2=1(不合题意,舍去)原式=(2-x)/(x-1)×(x-1)/(x-2)²=1/(2-x)当x=0时,原式=1/2