Define f: R→ R by f(x) = mx + b. a. Show that f is a linear transformation when b = 0. b. Find a property of a linear transformation that is violated when b 0. c. Why is f called a linear function?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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29
and let
aps x into
is Ax for
se. Justify
ction.
on defined
ansforma-
mation.
T(C₁V₁+
2 in the
nation.
the set of
d if c is
he range
of vector
tion of a
reflects
-lem 2.)
b. The line segment from p to q is the set of points of the
form (1-1)p+tq for 0 ≤ ≤ 1 (as shown in the figure
below). Show that a linear transformation T maps this
line
segment onto a line segment or onto a single point.
(t = 1) q
(1-t)p+tq
X
(t = 0) p
41300
28. Let u and y be vectors in R". It can be shown that the set P of
all points in the parallelogram determined by u and v has the
form au + bv, for 0 ≤ a ≤ 1,0 ≤ b ≤ 1. Let T: R → Rm
be a linear transformation. Explain why the image of a point
in P under the transformation T lies in the parallelogram
determined by T(u) and T(v).
29. Define f: R → R by f(x) = mx + b.
a. Show that f is a linear transformation when b = 0.
b. Find a property of a linear transformation that is violated
when b 0.
Why is f called a linear function?
c.
30. An affine transformation T:R" → Rm has the form
T(x) = Ax + b, with A an m x n matrix and b in Rm. Show
that T is not a linear transformation when b
transformations are important in computer graphics.)
0. (Affine
31. Let T: R" → Rm be a linear transformation, and let
{V1, V2, V3} be a linearly dependent set in R". Explain why
the set {T(v₁), T(v2), T(v3)} is linearly dependent.
In Exercises 32-36, column vectors are written as rows, such as
x = (x₁, x₂), and T(x) is written as T(x₁, x₂).
32. Show that the transformation T defined by T(x₁, x₂) =
(4x12x2, 3|x2) is not linear.
Transcribed Image Text:and let aps x into is Ax for se. Justify ction. on defined ansforma- mation. T(C₁V₁+ 2 in the nation. the set of d if c is he range of vector tion of a reflects -lem 2.) b. The line segment from p to q is the set of points of the form (1-1)p+tq for 0 ≤ ≤ 1 (as shown in the figure below). Show that a linear transformation T maps this line segment onto a line segment or onto a single point. (t = 1) q (1-t)p+tq X (t = 0) p 41300 28. Let u and y be vectors in R". It can be shown that the set P of all points in the parallelogram determined by u and v has the form au + bv, for 0 ≤ a ≤ 1,0 ≤ b ≤ 1. Let T: R → Rm be a linear transformation. Explain why the image of a point in P under the transformation T lies in the parallelogram determined by T(u) and T(v). 29. Define f: R → R by f(x) = mx + b. a. Show that f is a linear transformation when b = 0. b. Find a property of a linear transformation that is violated when b 0. Why is f called a linear function? c. 30. An affine transformation T:R" → Rm has the form T(x) = Ax + b, with A an m x n matrix and b in Rm. Show that T is not a linear transformation when b transformations are important in computer graphics.) 0. (Affine 31. Let T: R" → Rm be a linear transformation, and let {V1, V2, V3} be a linearly dependent set in R". Explain why the set {T(v₁), T(v2), T(v3)} is linearly dependent. In Exercises 32-36, column vectors are written as rows, such as x = (x₁, x₂), and T(x) is written as T(x₁, x₂). 32. Show that the transformation T defined by T(x₁, x₂) = (4x12x2, 3|x2) is not linear.
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