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<Text-field style="Heading 1" layout="Normal">regra de Cramer,</Text-field>
<Text-field style="Text" layout="Normal"><Font italic="true">n.</Font> <Font encoding="UTF-8">um m\303\251todo para resolver</Font> <Hyperlink linktarget="Dictionary:Definition/simultaneousequations" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">equa\303\247\303\265es simult\303\242neas</Font></Hyperlink> pelo uso de matrizes: dado  <Font italic="true">n</Font> <Font encoding="UTF-8">equa\303\247\303\265es em</Font>  <Font italic="true">n</Font> <Font encoding="UTF-8">inc\303\263gnitas, da forma</Font></Text-field>
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estes podem ser escrito como A <Font bold="true">X</Font> = <Font bold="true">B</Font>, onde A <Font encoding="UTF-8">\303\251 a matriz dos coeficientes</Font> <Font italic="true">a<Font subscript="true">i,j</Font></Font>, <Font encoding="UTF-8">da coluna de inc\303\263gnitas</Font> <Font bold="true">X</Font> e <Font bold="true">B</Font> <Font encoding="UTF-8">a coluna de constantes e, depois, se A \303\251 n\303\243o-singular, o sistema de equa\303\247\303\265es tem uma \303\272nica solu\303\247\303\243o</Font></Text-field>
<Text-field style="Text" layout="Normal"><Equation executable="false" style="2D Math" input-equation="" display="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">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</Equation>, onde  <Font family="MaplePi">D</Font><Font subscript="true" italic="true">i</Font> <Font encoding="UTF-8">\303\251 o</Font> <Hyperlink linktarget="Dictionary:Definition/determinant" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman">determinante</Font></Hyperlink> da matriz derivada de A substituindo  <Font italic="true">i</Font><Font superscript="true">th</Font> a coluna  <Font bold="true">B</Font>. <Font encoding="UTF-8"> (Nomeado em homenagem ao matem\303\241tico f\303\255sico e su\303\255\303\247o </Font><Font italic="true">Gabriel Cramer</Font> (1704-52).)</Text-field>
<Text-field style="Text" layout="Normal"></Text-field>
</Worksheet>