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susanspagoot6385
13.11.2019 •
Mathematics
How many different ways can the line above be named? what are those names?
a. 2 ways, fggf
b. 3 ways; t, fg gf
c. 4 ways, t, fg, fg, gf
d. 5 ways: t, fg, gf, g, ch
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Ответ:
Step-by-step explanation:
A parallel plane will have the same normal vector (the coefficients of x, y, z), so will differ only in the constant. Changing the constant from 9 to anything else gives the equation of a parallel plane.
A perpendicular plane will have a normal vector that is perpendicular to the normal vector of the given plane. That is, the dot-product of the normal vectors will be zero. There are an infinite number of possible solutions. One of them is ...
5x -3y = 0
Its normal vector is <5, -3, 0> and the dot-product of that with the normal vector of the given plane is ...
<5, -3, 0> · <3, 5, -1> = (5)(3) +(-3)(5) +(0)(-1) = 15 -15 +0 = 0
Any plane whose coefficients a, b, c satisfy 3a+5b-c = 0 will be a normal plane.