我们把形如y＝ax２＋bx＋cpx２＋qx＋r（a、b、c、p、q、rR，p、q不全为０）的函数称为“分式”函数．现在介绍求这种函数值域的方法．一、形如y＝bx＋cqx＋r（q≠０）的函数值域的求法将函数解析式变形为y＝bq－brq－cqx＋r，当c＝brq，即bq＝cr（分子分母有共同的因式）时? We call the function y=ax2+bx+cpx2+qx+r (a, b, c, p, q, rR, p, q not all 0) a “fractional” function. Now we introduce the method to find the value range of this function. First, the form of the functional domain of the form y=bx+cqx+r(q≠0) transforms the function analytical expression to y=bq-brq-cqx+r, when c=brq, ie bq=cr (the numerator and denominator have a common factorization) Time?