Question

f

Answer 1

@helder_edwin

Answer 2

I think it has to be etiher B or d

Answer 3

the plane perpendicular to the vector (1,-1,3) are those that satisfy
\[ \large \begin{pmatrix}
x& y & z
\end{pmatrix}
\begin{pmatrix}
1\\ -1\\ 3
\end{pmatrix}=0 \]

Answer 4

forget the constant for a moment

Answer 5

this gives you
\[ \large x-y+3z=0 \]

Answer 6

How about the constant?

Answer 7

Would you add the 3 to get it to equal 0?

Answer 8

now the plane is supposed to pass through (1,1,1) then replacing (x,y,z)=(1,1,1) u get
\[ \large 1-1+3\cdot1=3 \]

Answer 9

subtract*

Answer 10

choose between A and B

Answer 11

B

Answer 12

right?

Answer 13

yes