- #1
Miike012
- 1,009
- 0
The question is in the paint doc.
My solution:
I created a matrix
1. first row: 1,1,-1|2 which represents the equation of the plane x + y - z = 2
second row: 2,-1,3|1 ... 2x - y + 3z = 1
2. I came up with the parametric equation:
x = 1 -2/3t
y = 1 + 5/3t
z=t
3. The vector that represents this line is:
<-2/3,5/3,0> = <-2,5,0>
4. A point on the line is (1,1,0)
5. <-1,2,1> - <1,1,0> = <-2,1,1> ... Vector // to plane Note: (-1,2,1) is a point on the plane.
6. <-2,1,1> x <-2,5,0> = <5,2,8>
7. 5(x-1) + 2(y-1) + z = 0
or
5x + 2y + z = 7
The answer in the back of the book is: x - 2y + 4z = -1
My solution:
I created a matrix
1. first row: 1,1,-1|2 which represents the equation of the plane x + y - z = 2
second row: 2,-1,3|1 ... 2x - y + 3z = 1
2. I came up with the parametric equation:
x = 1 -2/3t
y = 1 + 5/3t
z=t
3. The vector that represents this line is:
<-2/3,5/3,0> = <-2,5,0>
4. A point on the line is (1,1,0)
5. <-1,2,1> - <1,1,0> = <-2,1,1> ... Vector // to plane Note: (-1,2,1) is a point on the plane.
6. <-2,1,1> x <-2,5,0> = <5,2,8>
7. 5(x-1) + 2(y-1) + z = 0
or
5x + 2y + z = 7
The answer in the back of the book is: x - 2y + 4z = -1
