Equation dune droite
2- La droite D d'équation y = ax+b est parallèle au vecteur u 1 a qui est appelé vecteur directeur de la droite 3- Les droites D et D' d'équations |
Une équation de droite se présente sous la forme : y = ax + b avec a le coefficient directeur et b l'ordonnée à l'origine.
Ici b = 2, car la droite coupe l'axe des ordonnées au point 2.
Pour déterminer a, il suffit de se placer sur le point correspondant à l'ordonnée à l'origine (b).
Utilisez l'un des points de l'équation y = mx + b.
Insérez les coordonnées de l'un des points dans l'équation où m est la pente.
Ensuite, résolvez pour b, qui est l'intersection de l'axe des ordonnées (Y) de la ligne qui relie les deux points.
Cette équation réduite est de la forme y = mx + p.
On calcule la valeur de m : .
On calcule la valeur de l'ordonnée à l'origine p, à partir des coordonnées du point A(3 ; 1).
Comme A appartient à (d4), il vérifie l'équation y = 1x + p.
Pour déterminer l'équation de la tangente d'une courbe représentative en un point donné, il y a une formule prête à l'emploi.
La formule pour l'équation réduite de la tangente de en est donnée par : y = f ′ ( a ) ( x − a ) + f ( a ) Voyons maintenant comment l'utiliser avec un exemple concret.
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Evaluating Expressions Using Algebra CalculatorChecking Answers Using Algebra CalculatorSolving Equations Using Algebra CalculatorSolving Systems of Equations Using Algebra Calculator mathpapa.com
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