由a+b+c=ab推导：ab-a-b+1=c+1(a-1)(b-1)=c+1当a-1≥0,b-1≥0时3a+2b=5+3(a-1)+2(b-1)≥5+2√(3*2*(a-1)(b-1))=5+2√6(c+1)只能推导到这里,由于c值无法确定,条件a-1≥0、b-1≥0也是无法确定的,最终最小值也无法确定....