Предмет: Алгебра, автор: ZifeXC

Помогите пожалуйста!​

Приложения:

Ответы

Автор ответа: NNNLLL54
1

Ответ:

Задано уравнение прямой   \bf -\dfrac{1}{2} \cdot (x-6)+4\cdt \Big(y-\dfrac{3}{4}\Big)=0  .

Приведём это уравнение к уравнению с угловым коэффициентом

 \bf y=kx+b  . А также запишем координаты нормального вектора n .

\bf -\dfrac{1}{2} \cdot x+3+4\cdot y-3=0\\\\-\dfrac{1}{2}\, x+4y=0\ \Big|\cdot (-2)\\\\x-8y=0\ \ \ \Rightarrow \ \ \ \overline{n}=(\, 1\, ;-8\, )\\\\y=\dfrac{1}{8}\, x\ \ \ \Rightarrow \ \ \ k=\dfrac{1}{8}\ \ ,\ \ b=0                

P.S.   Уравнение прямой на плоскости через нормальный вектор :  

\bf Ax+By+C=0\ \ ,\ \ \overline{n}=(A;B)  .

Уравнение прямой на плоскости через угловой коэффициент :

\bf y=kx+b  .

Переведём уравнение прямой через нормальный вектор в уравнение прямой через угловой коэффициент :

  \bf Ax+By+C=0\ \ \Rightarrow \ \ \ By=-Ax-C\ \ ,\ \ y=-\dfrac{A}{B}\, x-\dfrac{C}{B}\ \ \Rightarrow \\\\k=-\dfrac{A}{B}\ ,\ \ b=-\dfrac{C}{B}

Приложения:

ZifeXC: Если вас не затруднит, то могли бы вы обьяснить глупому мне, как вы это решили (ну или просто напишите использованные формулы)
NNNLLL54: Для начала раскрыли скобки, привели подобные члены . Зная уравнение прямой через нормальный вектор Ax+By+C=0 , записали координаты нормального вектора n=(A;B) . Зная уравнение прямой с угловым коэффициентом y=kx+b записали ур. прямой в таком виде .
NNNLLL54: смотри , дописала
ZifeXC: Спасибо:)
Похожие вопросы
Предмет: Английский язык, автор: wkatja2703
Scene 4 Detective: Ok. I have a few questions that I need to ask you about the moment the crime occurred. What _________ (do) yesterday at exactly 2:39PM? Suspect 1: I was sitting outside and I _________ (eat) at 2:39. Detective: And you were eating your food? Suspect 1: Well, not exactly. You see, right before 2:39, I _________ (find) some free food on the table, so I was eating it. Detective: Hmm. I see. Then it couldn’t have been you. You could _________ (not, take) the paperclip. It’s just not possible. Suspect 1: That’s right. Scene 5 Detective: What are you doing? Suspect 2: I _________ (not, do) anything! Detective: I _________ (look) for you for a long time. Suspect 2: But why?! I _________ (not, do) anything wrong…yet. Detective: Ok…what’s in your hand? Suspect 2: What are you talking about? My hand _________ (cut off) years ago in a scissors accident! Detective: By the time I _________ (finish) this case, the Greenland drug deal _________ (start) and _________ (end) already. Scene 6 Jake: What are you doing? Detective: I _________ (look) for a woman with two hands. Jake: Well, that lady has two hands. Detective: What?! Where? Jake: I know she has two hands because she always _________ (wear) gloves…two of them! Detective: Let’s go! Scene 7 Detective: I need to ask you some questions, and I hope you have a good alibi. Where were you yesterday? Suspect 3: I was in…um…I was in Papertown. You _________ (never, hear) of it. It’s in another country. It’s near…um…Pinkland. Detective: Pinkland? Papertown? Ok, well then show me the stamp in your passport. Suspect 3: I _________ (not, have) a passport. I mean, I _________ (not, have) a passport yesterday. What I mean is, I _________ (never, own) a passport in my life! Detective: Ok, ma’am, you’re making your situation worse by the minute. I can see that you have two hands! Now tell me about the jewelry that you usually _________ (wear). Suspect 3: I usually just wear rings. Detective: Ok. You usually wear rings, but you _________ (not,
Предмет: Алгебра, автор: yelyzaveta5428