- #1
Physics345
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Homework Statement
Find the scalar, vector, and parametric equations of a plane
that has a normal vector n→=(3,−4,6) and passes through the point P(9, 2, –5).
Homework Equations
Ax+By+Cz+D=0
(x,y,z)=(x0,y0,z0)+s(a1,a2,a3)+t(b1,b2,b3)
x=x0+sa1+tb1
y=y0+sa2+tb2
z=z0+sa3+tb3
The Attempt at a Solution
Scalar Equation:
3x-4y+6z+D=0
3(9)-4(2)+6(-5)+D=0
D=11
3x- 4y +6z+11=0
Vector Equation:
4y=3x+6z+11
y=3/4 x+6/4 z+11
y=3/4 x+3/2 z+11
P(9,2,-5)
Let x=0 and z=0
y=11
Q(0,11,0)
let x=2 and z=1
y=3/4(2)+3/2(1)+11
y=14
R(2,14,1)
(PQ) ⃗ =Q-P
(PQ) ⃗ =(0,11,0)-(9,2,-5)=(-9,9,5)
(PR) ⃗ =R-P
(PR) ⃗ =(2,14,1)-(9,2,-5)=(-7,12,6)
(x,y,z)=(9,2,-5)+s(-9,9,5)+t(-7,12,6)
Parametric Equations:
x=9-9s-7t
y=2+9s+12t
z=-5+5s+6t
Did I do this correctly? And is there anyway to confirm my answers through math? Thanks in advance =)