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rusak2 [61]
3 years ago
13

Find the line through

Mathematics
2 answers:
klio [65]3 years ago
8 0

Answer:  The answer is  x=-1+2i,~y=-2+2j,~z=-1+2k.


Step-by-step explanation: The vector equation of the line can be written as

(x,y,z)=(-1,-2,-1)+t(i+j+k).

The general equation of the plane that is perpendicular to this line will be

x+y+z=c.

Since it contains the point (7,1,-6), so

7+1-6=c\\\\\Rightarrow c=2.

Therefore, the plane x+y+z=2 contains the point (7,1,-6) and is perpendicular to the line.

Now, we will substitute the parametric equations of the line into the equation of the plane as follows

x+y+z=2\\\\\Rightarrow (-1+t)+(-2+t)+(-1+t)=2\\\\\Rightarrow 3t=6\\\\\Rightarrow t=2.

So, the parametric equation of the new line is

(x,y,z)=(-1,-2,-1)+2(i+j+k)\\\\\Rightarrow x=-1+2i,~y=-2+2j,~z=-1+2k.

Kaylis [27]3 years ago
3 0

Answer:

(\frac{1}{2},\frac{-1}{2},\frac{1}{2})

Step-by-step explanation:

We have been given the intersection coordinates:

(7,1,-6) and perpendicular to the line x=-1+t ,y=-2+t and z=-1+t

From the condition of perpendicularity we know:  

(7,1,-6)(x,y,z)

\Rightarrow 7x+y-6z=0

Now, we have given x=-1+t , y=-2+t and  z= -1+t

7(-1+t)+(-2+t)-6(-1+t)=0

-7+7t-2+t+6-6t=0

\Rightarrow -3+2t=0

2t=3

t=\frac{3}{2}

Now, substituting t in the given coordinates x,y and z we get:

x=-1+\frac{3}{2}=\frac{1}{2}

y=-2+\frac{3}{2}=\frac{-1}{2}

And z=-1+\frac{3}{2}=\frac{1}{2}



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