Consider the line which passes through the point P(-5, 1, 4), and which is parallel to the line x=1+7t, y=2+1t, z=3+7t Find the point of intersection of

Question:

Consider the line which passes through the point P(-5, 1, 4), and which is parallel to the line x=1+7t,y=2+1t,z=3+7t. Find the point of intersection of this new line with each of the coordinate planes: xy-plane, xz-plane and yz-plane.

The line intersects the xy plane at (-3, , 0)

The line intersects the xz plane at (-13, 0, -11)

The line intersects the yz plane at (0, , 2)

Step-by-step explanation:

Vector form of a line can be written as;

r(t) = r₀ + vt

Where;

r₀ = position vector of the point where the line passes through

v = direction or slope vector of the line.

From the question, we have a line passing through the point P(-5, 1, 4). This means that;

r₀ = (-5, 1, 4)

Also, the line is parallel to another line with parametric equations:

x=1+7t ------------------(i)

y=2+1t ----------------(ii)

z=3+7t ---------------(iii)

Since the first line is parallel to the second line, then their gradient or slope vector must be the same. This means that;

v = (7, 1, 7)           [which are the coefficients of t in the parametric equations]

Therefore, the first line can be written as;

r(t) = (-5, 1, 4) + (7, 1, 7)t

Now, to get the point of intersection of this line with each of the coordinates;

(i) The line will intersect the the xy plane when z = 0

Substitute z = 0 into equation (iii)

0 = 3 + 7t

t =

Now substitute t = into equation(i)

x = 1 + 7()

x = -3

Also, substitute t = into equation (ii)

y = 2 + 1()

y =

Therefore, the line intersects the xy plane at (-3, , 0)

(ii) The line will intersect the xz plance when y = 0

Substitute y = 0 into equation (ii)

0 = 2 + 1t

t = -2

Now substitute t = -2 into equation(i)

x = 1 + 7(-2)

x = 1 - 14

x = -13

Also, substitute t = -2 into equation (iii)

z = 3 + 7(-2)

z = 3 - 14

z = -11

Therefore, the line intersects the xz plane at (-13, 0, -11)

(iii) The line will intersect the yz plane when x = 0

Substitute x = 0 into equation (i)

0 = 1 + 7t

t =

Now substitute t = into equation(ii)

y = 2 + 1()

y =

Also, substitute t = into equation (iii)

z = 3 + 7()

z = 3 - 1

z = 2

Therefore, the line intersects the yz plane at (0, , 2)

step-by-step explanation:

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391.6 is the correct answer