Question

求下列函数的自变量取值范围y=3x-1y=1/x+2y=根号x-2b=三次根号a-1/5

Answer 1

y=3x-1,自变量取值范围x∈R

y=1/(x+2),x+2≠0,自变量取值范围x≠-2

y=√(x-2),x-2≥0,自变量取值范围x≥2

b=³√a-1/5,自变量取值范围a∈R