Find parametric equations the line (Use the parameter t.)The line

n2z1emldk

n2z1emldk

Answered question

2021-12-02

Find parametric equations the line (Use the parameter t.)
The line through the origin and the point (9, 3, 1)
(x(t), y(t), z(t))=?
Find the symmetric equations.
a) x9=y3=z
b) x+9=y+3=z1
c) x9=y3=z+1
d) x9=y3=z
e) x3=y9=z

Answer & Explanation

James Etheridge

James Etheridge

Beginner2021-12-03Added 16 answers

Step 1
x=x0+at, y=y0+bt, z=z0+ctx=0+9t, y=0+3t, z=0t
For symmetric equations solve each of the parametric equations for t and set equal to each other
t=x9, t=y3, t=z
x9=y3=z1
Thus parametric equations are x=9t, y=3t, z=t
and symmetric equations are x9=y3=z

nick1337

nick1337

Expert2023-05-27Added 777 answers

Result:
x9=y3=z
Solution:
We can find the direction vector of the line by subtracting the coordinates of the origin from the coordinates of the point (9, 3, -1). The direction vector is given by:
d=(931)(000)=(931)
The parametric equations can be written as:
x(t)=x0+dx·t
y(t)=y0+dy·t
z(t)=z0+dz·t
where (x0,y0,z0) is a point on the line, and (dx,dy,dz) is the direction vector.
In this case, (x0,y0,z0)=(0,0,0) since the line passes through the origin. Therefore, the parametric equations become:
x(t)=0+9·t
y(t)=0+3·t
z(t)=0+(1)·t
Simplifying the equations, we get:
x(t)=9t
y(t)=3t
z(t)=t
The symmetric equations can be obtained by eliminating the parameter t from the parametric equations. In this case, we can equate the ratios of x(t), y(t), and z(t) to get:
x(t)9=y(t)3=z(t)1
Simplifying further, we have:
x9=y3=z
Therefore, the symmetric equations for the line passing through the origin and the point (9, 3, -1) are:
x9=y3=z
Don Sumner

Don Sumner

Skilled2023-05-27Added 184 answers

To find the parametric equations of the line and its symmetric equations, let's start by considering the given points: the origin, O(0, 0, 0), and the point P(9, 3, -1).
The parametric equations of a line can be expressed as:
x(t)=x0+aty(t)=y0+btz(t)=z0+ct
where (x₀, y₀, z₀) is a point on the line and (a, b, c) is a direction vector of the line.
To find the direction vector, we can subtract the coordinates of the two points:
v=PO=(9,3,1)(0,0,0)=(9,3,1)
Now we can substitute the values into the parametric equations:
x(t)=0+9ty(t)=0+3tz(t)&=0t
Therefore, the parametric equations of the line are:
x(t)=9ty(t)=3tz(t)=t
To find the symmetric equations, we can eliminate the parameter t from the parametric equations:
x9=y3=z1
Multiplying each ratio by a common denominator gives:
x9=y3=z1=k
where k is a constant.
Therefore, the symmetric equations of the line are:
x9=y3x9=z1
or, by eliminating fractions:
3x=9yx=9z
These are the symmetric equations of the line passing through the origin and the point (9, 3, -1).

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