Answer:
Step-by-step explanation:
I am going to assume that by "f-1(x)" you mean 
, which makes this an inverse function problem. To find the inverse of a function, simply swap x and y, then solve for y.
X = 3
y = -3
You will see this using any graphing tool at your disposal.
Answer:
Its A.
Step-by-step explanation:
The plane you want is parallel to another plane, <em>x</em> - <em>y</em> + <em>z</em> = -5, so they share a normal vector. In this case, it's ⟨1, -1, 1⟩.
The plane must also pass through the point (0, 4, 4) since it contains <em>r</em><em>(t)</em>. Then the equation of the plane is
⟨<em>x</em>, <em>y</em> - 4, <em>z</em> - 4⟩ • ⟨1, -1, 1⟩ = 0
<em>x</em> - (<em>y</em> - 4) + (<em>z</em> - 4) = 0
<em>x</em> - <em>y</em> + <em>z</em> = 0
