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anetaa
@anetaa
July 2022
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Даны точки М(0;1;1),n(2;-1;3),К(-1;у;0).найдите такое значение у,чтобы выполнялось условие МК=NK.
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oganesbagoyan
Verified answer
MK²=NK²
(-1-0)²+(y-1)²+(0-1)²=(-1-2)²+(y-(-1))²+(0-3)²
(y+1)²-(y-1)²= -16
((y+1)-(y-1))((y+1)+(y-1)) = -16
2*2y= -16
y= - 4
ответ : - 4
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Answers & Comments
Verified answer
MK²=NK²(-1-0)²+(y-1)²+(0-1)²=(-1-2)²+(y-(-1))²+(0-3)²
(y+1)²-(y-1)²= -16
((y+1)-(y-1))((y+1)+(y-1)) = -16
2*2y= -16
y= - 4
ответ : - 4