Question

函数y=根号下[log1/2（x²-1）]的定义域是（ ）.求详解,说明：整个式子都在根号内.

Answer 1

被开方式非负

log(1/2) (x²-1)≥0

即 log(1/2) (x²-1)≥log(1/2) 1

∴ 0