求(3t*t+3)/(3t*t-4t)的值域

问题描述:

求(3t*t+3)/(3t*t-4t)的值域

(3t*t+3)/(3t*t-4t)
=1 + 4 /(3t-4)
值域是:(-∞,1)∪(1,+∞)