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De paramètriques a contínua i viceversa
Per passar de paramètriques a contínua, s'identifica el punt (xA,yA) i el vector (xV,yV) i s'escriu la contínua
begin mathsize 12px style open curly brackets table row cell bold x bold equals bold x subscript bold A bold plus bold x subscript bold V bold times bold k end cell row cell bold y bold equals bold y subscript bold A bold plus bold y subscript bold V bold times bold k end cell end table close bold rightwards double arrow open curly brackets table attributes columnalign left end attributes row cell bold Punt open parentheses bold x subscript bold A bold comma bold y subscript bold A close parentheses end cell row cell bold Vector open parentheses bold x subscript bold v bold comma bold y subscript bold v close parentheses end cell end table close bold rightwards double arrow bold Contínua bold colon fraction numerator bold x bold minus bold x subscript bold A over denominator bold x subscript bold V end fraction bold equals fraction numerator bold y bold minus bold y subscript bold A over denominator bold y subscript bold V end fraction open curly brackets table row cell bold x bold equals bold 2 bold minus bold 3 bold k end cell row cell bold y bold equals bold minus bold 5 bold plus bold 9 bold italic k end cell end table close bold rightwards double arrow open curly brackets table attributes columnalign left end attributes row cell bold P bold u bold n bold t open parentheses bold 2 bold comma bold minus bold 5 close parentheses end cell row cell bold V bold e bold c bold t bold o bold r open parentheses bold minus bold 3 bold comma bold 9 close parentheses end cell end table close bold rightwards double arrow bold C bold o bold n bold t bold í bold n bold u bold a bold colon fraction numerator bold x bold minus bold 2 over denominator bold minus bold 3 end fraction bold equals fraction numerator bold y bold plus bold 5 over denominator bold 9 end fraction end style
Per passar de contínua a paramètriques, s'identifica el punt (xA,yA) i el vector (xV,yV) i s'escriuen les paramètriques
begin mathsize 12px style fraction numerator bold x bold minus bold x subscript bold A over denominator bold x subscript bold V end fraction bold equals fraction numerator bold y bold minus bold y subscript bold A over denominator bold y subscript bold V end fraction bold rightwards double arrow open curly brackets table attributes columnalign left end attributes row cell bold Punt open parentheses bold x subscript bold A bold comma bold y subscript bold A close parentheses end cell row cell bold Vector open parentheses bold x subscript bold v bold comma bold y subscript bold v close parentheses end cell end table close bold rightwards double arrow bold italic P bold italic a bold italic r bold italic a bold italic m bold italic è bold italic t bold italic r bold italic i bold italic q bold italic u bold italic e bold italic s open curly brackets table row cell bold x bold equals bold x subscript bold A bold plus bold x subscript bold V bold times bold k end cell row cell bold y bold equals bold y subscript bold A bold plus bold y subscript bold V bold times bold k end cell end table close fraction numerator bold x bold minus bold 2 over denominator bold minus bold 3 end fraction bold equals fraction numerator bold y bold plus bold 5 over denominator bold 9 end fraction rightwards double arrow table attributes columnalign left end attributes row cell bold Punt open parentheses bold 2 bold comma bold minus bold 5 close parentheses end cell row cell bold Vector open parentheses bold minus bold 3 bold comma bold 9 close parentheses end cell end table rightwards double arrow P a r a m è t r i q u e s open curly brackets table row cell bold x bold equals bold 2 bold minus bold 3 bold k end cell row cell bold y bold equals bold minus bold 5 bold plus bold 9 end cell end table space space space space space space space space space close end style
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