“问题导学”下的新授课教学模式.doc

doi:10.3969/j.issn.0450-9889(B).2011.06.003-1-1) 2) 3) 4) 12-211CF(xy)=0F(xy)=0CCFxy=0?F(xy)=0xyC-22(A)y=x2/x(B)y=x2/x(1)y=(x)2(x0)(2)y=x(3)y=|x|(C)-(C)33C1C2C-44:127 y=x2x021y=x1212y=(x)2(X0)1y=x2y= |x|12y=x2/x5-31(1)(2)yx(y)_yxx=(y)yCX=(y)xA2x=f-1(y)yCy=f(x)xAx=f-1(y)yCy=f(x)XA3x=f-1(y)(yC)y=f-1(x)(XC)(3)y=f-1(x)(4)y=f(x)xxy1212?-