问题 填空题 函数y=loga(x-1)(0<a<1)的定义域为______. 答案 loga(x-1)≥0=loga1∵0<a<1∴0<x-1≤1,解得1<x≤2∴函数y=loga(x-1)(0<a<1)的定义域为(1,2]故答案为:(1,2]