Business Calculus
x∈R\{−2,−1}x\(\in\]\mathbb{R}\[\backslash\]\left\[\lbrace\)-2,-1\(\right\]\rbrace\)
x∈R\{1,2}x\(\in\]\mathbb{R}\[\backslash\]\left\[\lbrace\)1,2\(\right\]\rbrace\)
x∈R\{−2,1}x\(\in\]\mathbb{R}\[\backslash\]\left\[\lbrace\)-2,1\(\right\]\rbrace\)
x∈R\{−1,2}x\(\in\]\mathbb{R}\[\backslash\]\left\[\lbrace\)-1,2\(\right\]\rbrace\)