In Exercises 1–4 , determine whether the operators T 1 and T 2 commute; that is, whether T 1 ∘ T 2 = T 2 ∘ T 1 . T 1 : R 3 → R 3 is the reflection about the xy -plane and T 2 : R 3 → R 3 is given by the formula T ( x , y , z ) = (2 x , 3 y , z ).
In Exercises 1–4 , determine whether the operators T 1 and T 2 commute; that is, whether T 1 ∘ T 2 = T 2 ∘ T 1 . T 1 : R 3 → R 3 is the reflection about the xy -plane and T 2 : R 3 → R 3 is given by the formula T ( x , y , z ) = (2 x , 3 y , z ).
where wi
The linear operator T: R³ → R³ is defined by T(x1, x2, x3) = (W₁, W2, W3),
2x1 + 4x2 + x3; W2 = 9x2+2x3; W3 = 2x1 - 8x2 - 2x3.
=
Which of the following is correct.
(a) T is not one to one.
(b) T is one to one but the standard matrix for T-1 does not exist.
0
(c) T is one to one and its standard matrix for T−¹ is
1
-4 -3
13
3
(d) T is one to one and its standard matrix for T-¹ is
0
6
(e) None of these
3.
13 23 3
2
3
1 -4
2
3
A
-3
162/3 3
Q.3. Let R, (x) be a reflection of any vector x through the line along the vector u and P, (x)
be a projection of any vector x onto the line along the vector u. Find the transformation RP
for u =
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