1.) Let V be the set of all polynomials of exactly degree 2 with the definitive of addition and scalar multiplication as in example 6. EXAMPLE 6 Another source of examples are sets of polynomials; therefore, we recall some well-known facts about such functions. A polynomial (in ) is a function that is expressible as p(t) =ant"+an-1" + + a₁ + ao. where ao. a₁.....a, are real numbers and n is a nonnegative integer. If a,, # 0. then p(t) is said to have degree n. Thus the degree of a polynomial is the highest power of a term having a nonzero coefficient; p(1)=2r + 1 has degree 1, and the constant polynomial p(t) = 3 has degree 0. The zero polynomial, denoted by 0. has no degree. We now let Pr, be the set of all polynomials of degreen together with the zero polynomial. If p(t) and q (t) are in P, we can write p(t) =ant" +an-1-¹++ a₁t+ao and q(t)=bat" +bn-1t+...+bit + bo. We define p(1)q(t) as p(t) @q(t) = (a + b)!" + (an-1+ba-1)-1++ (a₁ + b₁)t + (ao+bo). If c is a scalar, we also define c o p(1) as cop(t) = (ca,)t" + (ca,-1)"++(ca₁)t + (cap). We now show that P, is a vector space. Let p(t) and q (1), as before, be elements of P₁; that is, they are polynomials of degreen or the zero polynomial. Then the previous definitions of the operations and Ⓒ show that p(t)q(r) and ep(1), for any scalar e, are polynomials of degreen or the zero polynomial. That is, p(t)q(t) and c o p(t) are in P, so that (a) and (b) in Definition 4.4 hold. To verify property (1), we observe that q(1) p(t) = (b +a,)t" + (bn-1+an-1) ++ (b₁ +₁)r+ (ao + bo). and since a, + b, = b; +a, holds for the real numbers, we conclude that p(1) q(1) = q(1) p (1). Similarly, we verify property (2). The zero polynomial is the element 0 needed in property (3). If p() is as given previously, then its negative, -p(t), is astag. We shall now verify property (6) and will leave the verification of the remaining properties to the reader. Thus (c+d) Ⓒ p(t) = (c + d)ant" + (c+d)an-it-1+...+(c+d)at + (c +d)ao = cant" + dant" + can-1"+dan-1-1+...+cart +dayt + cao + dao =c(at" a-t-+ + a₁ + a) + d(ant"+an-1"++at+ao) =cop(1) @dop(1). a.) Show that V is not closes under addition

Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter9: Polynomial And Rational Functions
Section9.2: Remainder And Factor Theorems
Problem 61PS
icon
Related questions
Question
Solve the following problems and show your complete solutions. Write it on a paper and do not type your answer.
1.) Let V be the set of all polynomials of exactly degree 2 with the definitive of addition and scalar
multiplication as in example 6.
EXAMPLE 6
Another source of examples are sets of polynomials; therefore, we recall some
well-known facts about such functions. A polynomial (in 1) is a function that is
expressible as
p(t) =ant"+an-1" + + a₁ + ao.
where do. a₁.....a, are real numbers and n is a nonnegative integer. If a, # 0.
then p(t) is said to have degree n. Thus the degree of a polynomial is the highest
power of a term having a nonzero coefficient; p(1)=2r + 1 has degree 1, and the
constant polynomial p(t) = 3 has degree 0. The zero polynomial, denoted by 0.
has no degree. We now let P₁, be the set of all polynomials of degree ≤n together
with the zero polynomial. If p(t) and q (t) are in P, we can write
p(t) =ant" +an-1-++at+ao
and
q(t)=bat" +b-11 +...+bit + bo.
We define (1) q(1) as
p(t) @q(t) = (a + b)t + (an-1+ba-1)-1++ (a₁ + b₁)t + (ao+bo).
If c is a scalar, we also define c o p(1) as
cop(t) = (ca,)t" + (ca-1)++(ca)r + (cap).
We now show that P, is a vector space.
Let p(t) and q (1), as before, be elements of P₁; that is, they are polynomials of
degreen or the zero polynomial. Then the previous definitions of the operations
and Ⓒ show that p(t)q(1) and cop(1), for any scalar e, are polynomials of
degreen or the zero polynomial. That is, p(t)q(t) and eo p(t) are in P, so
that (a) and (b) in Definition 4.4 hold. To verify property (1), we observe that
g (1) p(1) = (b, + a)t" +(bn-1+ an-1)-1++ (b₁ + ₁)² + (ao+bo).
and since a, + b₁ = b; +a, holds for the real numbers, we conclude that p(r)
q(1) = q (1) p(1). Similarly, we verify property (2). The zero polynomial is the
element 0 needed in property (3). If p() is as given previously, then its negative,
-p(t), is
--ast-ag.
We shall now verify property (6) and will leave the verification of the remaining
properties to the reader. Thus
(c+d) Ⓒ p(t) = (c+d)ant" +(c+d)an-1-1++(c+d)at
+ (c + d)ao
= cant" + dant" + can-1"+dan-1-1+...+cart
+ dayt + cao + dao
= c(ant" | an-1"-+-+at+ap)
+d(ant"+an-1t++at+ao)
=cop(1) dop(1).
a.) Show that V is not closes under addition
Transcribed Image Text:1.) Let V be the set of all polynomials of exactly degree 2 with the definitive of addition and scalar multiplication as in example 6. EXAMPLE 6 Another source of examples are sets of polynomials; therefore, we recall some well-known facts about such functions. A polynomial (in 1) is a function that is expressible as p(t) =ant"+an-1" + + a₁ + ao. where do. a₁.....a, are real numbers and n is a nonnegative integer. If a, # 0. then p(t) is said to have degree n. Thus the degree of a polynomial is the highest power of a term having a nonzero coefficient; p(1)=2r + 1 has degree 1, and the constant polynomial p(t) = 3 has degree 0. The zero polynomial, denoted by 0. has no degree. We now let P₁, be the set of all polynomials of degree ≤n together with the zero polynomial. If p(t) and q (t) are in P, we can write p(t) =ant" +an-1-++at+ao and q(t)=bat" +b-11 +...+bit + bo. We define (1) q(1) as p(t) @q(t) = (a + b)t + (an-1+ba-1)-1++ (a₁ + b₁)t + (ao+bo). If c is a scalar, we also define c o p(1) as cop(t) = (ca,)t" + (ca-1)++(ca)r + (cap). We now show that P, is a vector space. Let p(t) and q (1), as before, be elements of P₁; that is, they are polynomials of degreen or the zero polynomial. Then the previous definitions of the operations and Ⓒ show that p(t)q(1) and cop(1), for any scalar e, are polynomials of degreen or the zero polynomial. That is, p(t)q(t) and eo p(t) are in P, so that (a) and (b) in Definition 4.4 hold. To verify property (1), we observe that g (1) p(1) = (b, + a)t" +(bn-1+ an-1)-1++ (b₁ + ₁)² + (ao+bo). and since a, + b₁ = b; +a, holds for the real numbers, we conclude that p(r) q(1) = q (1) p(1). Similarly, we verify property (2). The zero polynomial is the element 0 needed in property (3). If p() is as given previously, then its negative, -p(t), is --ast-ag. We shall now verify property (6) and will leave the verification of the remaining properties to the reader. Thus (c+d) Ⓒ p(t) = (c+d)ant" +(c+d)an-1-1++(c+d)at + (c + d)ao = cant" + dant" + can-1"+dan-1-1+...+cart + dayt + cao + dao = c(ant" | an-1"-+-+at+ap) +d(ant"+an-1t++at+ao) =cop(1) dop(1). a.) Show that V is not closes under addition
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Algebra for College Students
Algebra for College Students
Algebra
ISBN:
9781285195780
Author:
Jerome E. Kaufmann, Karen L. Schwitters
Publisher:
Cengage Learning
Elements Of Modern Algebra
Elements Of Modern Algebra
Algebra
ISBN:
9781285463230
Author:
Gilbert, Linda, Jimmie
Publisher:
Cengage Learning,
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning
College Algebra
College Algebra
Algebra
ISBN:
9781938168383
Author:
Jay Abramson
Publisher:
OpenStax
Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning