2014年北京高考文数试卷的20题如下:已知函数f(x)=2x~3-3x,(Ⅱ)若过点(1,t)存在3条直线与曲线y=f(x)相切,求t的取值范围.无独有偶,2016年沧州质检文科试卷上的21题与其相似:已知函数f(x)=ax~3-3x,g(x)=xlnx+6~(1/2)/9,且函数y=f(x)与函数y=g(x)的图像在交点处存在公共切线,(Ⅱ)若 20 questions in the 2014 college entrance examination paper are as follows: It is known that the function f (x) = 2x ~ 3-3x, (ii) if there are 3 straight lines and the curve y = f Cut, find the range of values. Coincidentally, 2016 Cangzhou QC Papers on 21 questions and their similar: Known function f (x) = ax ~ 3-3x, g (x) = xlnx + 6 ~ / 2) / 9, and there exists a common tangential line at the intersection of the function y = f (x) and the function y = g (x)