Предмет: Математика, автор: lyna8365

Складіть рівняння прямої , зображеної на рисунку

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Ответы

Автор ответа: Аноним

Ответ у=х+2

В уравнение прямой у=кх+b подставим точки (0;2)

и (-2;0), которые принадлежат прямой. вторая принадлежит, т.к. угол между прямой и осью ох 45°.

получим систему уравнений.

2=0*к+b⇒b=2

0=-2*к+2

2к=2⇒к=1

откуда и следует ответ.

2 способ. тангенс 45°=1- это угловой коэффициент прямой.

а ордината точки пересечения с осью оу равна 2

Значит, в уравнении y=кх+b

k=1 ; b=2

Искомое уравнение у=х+2

Ответ у=х+2, его можно записать по- другому. перенеся у влево со знаком минус. получим х-у+2=0

lyna8365: у меня нет такой ответ

lyna8365: А х-у-2=0 Б х+у+2=0

lyna8365: В х-у+2=0 Г х+у-2=0

lyna8365: ?????????

lyna8365: дякую）можете допомогти ще з питаннями будь ласка

lyna8365: спасибо) можете помочь еще с вопросами пожалуйста

djjdhshsgsgsgsshdh: Добрий день. Допоможіть будь-ласка з лексикології та фразеології. https://znanija.com/task/39775048

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Складіть рівняння прямої , зображеної на рисунку​

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Складіть рівняння прямої , зображеної на рисунку