第1页共3页2023年高考数学求定义域专题练习附答案一单选题1函数119891119909119909111199092的定义域为A1B1C122D1222函数1198911199091lg21199091的定义域为A11990911990912B11990911990912且1199091C11990911990912且1199091D119909119909123函数fx11990911199092的定义域为A122B1C12D14函数119891119909119909120119909211199092的定义域为A212B2C21212D125若集合119860119910119910cos119909119909119877119861119909119910ln119909则119860119861A11B0C01D6函数119891119909lg11990911119909的定义域是A11B11C1D17若函数11989111990911990941199095的定义域为集合119860则119860A4B5C45D4558函数119891119909119909111