因为当x趋向1时,(x-1)^2会很小,能去到0到1,那么分母小,整个值就大.例：当x=2时,(x-1)^2=(2-1)^2=1当x=0时,(x-1)^2=(0-1)^2=1那y=1/(x-1)^2=1/1=1反过来说,当x趋向无穷时,无论是正数还是负数,(x-1)^2肯定是越大,那分...