Home/Algebra/Rational expressions and partial fractions/Domain of a rational expression6. Rational expressions and partial fractionsDomain of a rational expressionLevel: fundamentalIn 6. Rational expressions and partial fractionsFormulaCopy LaTeXR(x)=P(x)Q(x),Q(x)≠0R(x)=\frac{P(x)}{Q(x)},\quad Q(x)\ne0R(x)=Q(x)P(x),Q(x)=0Tagsalgebraexpressions rationalalgebra formulapartial fractionsdomain restrictionDetailThe denominator cannot be zero.Found an error? Contact us.Related formulasRelatedRational equationP(x)Q(x)=R(x)S(x)⇒P(x)S(x)=R(x)Q(x)\frac{P(x)}{Q(x)}=\frac{R(x)}{S(x)}\Rightarrow P(x)S(x)=R(x)Q(x)Q(x)P(x)=S(x)R(x)⇒P(x)S(x)=R(x)Q(x)Open formulaOpen in sectionRelatedDomainDom(f)={x:f(x) estaˊ definida}\operatorname{Dom}(f)=\{x:f(x)\text{ está definida}\}Dom(f)={x:f(x) estaˊ definida}Open formulaOpen in section