Polynomials Definition and 740 Threads

x^16 + 1 is irreducible over the rationals, correct?... ...also I am required to factorise the following polynomials 2) i) x^5 + 3x^4 + 2x^3 + x^2 -7 ii) x^5 + 10x^4 + 13x^3 -25x^2 -68x -60 now I would usually approach this using the factor theorem to find a factor and then...

factoring===================== 1. 16x^3 - 54 This one, I've broken it to 2(2^3 x^3 - 3^2) but it's still wrong! I don't get how much further it can be broken down! 2. 3x^4 - 48 This one.. I've gotten far as 3x^2 (x^2 - 4x + 4) ! Still wrong. ============================= Zeros... dang it I'm...

I am required to find all irreducible polynomials of the form xsquared + ax + b over the field F3, I have the 9 cases infront of me, i can see when something is reducible say xsquared is p(x)q(x) where p=x, q=x, but i have particular difficulty seeing when something is irreducible, e.g i know...

Homework help (polynomial graphing) here is the problem: [img=http://img267.imageshack.us/img267/3900/calculushelphd7.th.jpg] i need help with questions 3, 4 The Attempt at a Solution for number 3 i got more points from http://www40.statcan.ca/l01/cst01/prim11a.htm and plotted them, but i...

If f(x)=x^2 - 4x, determine an expression for g(x) g(x) = f(x + 2) How would I substitute f(x) when they are separated? my attempt g(x) = x^2 - 4x (x + 2)

Ok there's something I don't get. I know for instance that the linear polynomial for say f = 91 + 2x + 3y + 8z + Quadratic(x, y, z) + Cubic(x, y, z) ... is 91 + 2x + 3y + 8z if the base point is (0, 0, 0). This is pretty clear. What I don't get is why when you take the base point to be say (1...

Homework Statement Solve the following equations in terms of complex numbers without a calculator. d) x^3-x^2-x-2=0 e) x^4-2x^3+3x^2-2x+2=0 Homework Equations ? The Attempt at a Solution I don't know where to begin. I don't think I was taught this in college algebra...

The Horner’s method is an algorithm that evaluates polynomials. The following pseudocode shows how to use this method to find the value of anxn + an-1xn-1 + . . . + a1x + a0 at x = c. procedure Horner(c, a0, a1, a2, . . . , an : real numbers) y := an for i := 1 to n y := y × c + an-i end...

Homework Statement Use the Remainder Estimation Theorem to find an interval containing x=0 over which f(x) can be approximated by p(x) to three decimal-place accuracy throughout the interval. Check your answer by graphing |f(x) - p(x)| over the interval you obtained. f(x)= sinx p(x)=...

Homework Statement Find the Maclaurin polynomials of orders n=0, 1, 2, 3, and 4, and then find the nth Maclaurin polynomials for the function in sigma notation: f(x)= ln(1+x) Homework Equations pn(x)= f(0) + f'(0)x + [f''(0)/2!](x)^2 +[f'''(0)/3!](x)^3 + ... + [f^(n)(0)/n!](x)^n...

Dear experts. What do you know about applications of linear polynomials with integer coefficients? (For example, I know that these polynomials are applied in the field of integer programming and pattern recognition (clustering). Thanks in Advance.

(1-xt)/(1-2xt+t^2)=sum(Tn(x)t^n) How can i prove this equation? Could you give me a hint or suggestion?

The question requires me to check whether the following formulae satisfy the properties of an inner product given the linear space of all real polynomials. f(1)g(1) \left(\int_{0}^{1}f(t)dt\right)\left(\int_{0}^{1}g(t)dt\right) The properties are satisfied in both cases (at least, that's my...

w_{n} is primitive root of unity of order n, w_{m} is primitive root of unity of order m, all primitve roots of unity of order n are roots of Cyclotomic polynomials phi_{n}(x) which is a minimal polynomial of all primitive roots of unity of order n , similarly, phi_{m}(y) is a minimal...

Does anyone know why the lucas-lehmer test won't work with numbers represented by polynomials? The modulus polynomial does not divide the last term correctly for some reason. Example (the code boxes are polynomial long division): the numbers will be represented in base 4, so 4 = x p = x + 1...

Hello everyone i had some questions about legendre polynomials. I have solved most of them but i had just two not answered question. I tried to solve this problem by rodriguez rule but it was really hard for me. Could anyone help me or give me some hints for this question...

Are the following polynomials irreducible over Z2? (a) x2 + x + 1 (b) x2 + 1 (c) x2 + x

To show that two Legendre polynomials(Pn and Pm) are orthogonal wht is the test that i have to use? is it this? \int_{-1}^{1} P_{n}(x)P_{m}(x) dx = 0 in that case to prove that P3 and P1 are orthogonal i have to use the above formula??

I am supposed to determine whether or not the following two sets constitute a vector space. 1) The set of all polynomials degree two. 2) The set of all diagonal 2 x 2 matrices. For the first one, it will not be a vector space because it does not satisfy the closure property. Also the...

My task is to explicitly write down the first three Laguerre polynomials by using a power series ansatz. What should this ansatz look like? Should it be the Rodrigues representation L_n (x) = \frac{e^x}{n!} \frac{d^n}{dx^n} x^n e^{-x} ?

What differential equation does \phi_n (x) := e^{-x/2} L_n (x) solve? L_n is a Laguerre polynomial. Please give me a hint on this one. I haven't got a clue where to start.

Problem: Suppose we wish to expand a function defined on the interval (a,b) in terms of Legendre polynomials. Show that the transformation u = (2x-a-b)/(b-a) maps the function onto the interval (-1,1). How do I even start working with this? I haven't got a clue...

Problem: Show that \int_{-1}^{1} x P_n(x) P_m(x) dx = \frac{2(n+1)}{(2n+1)(2n+3)}\delta_{m,n+1} + \frac{2n}{(2n+1)(2n-1)}\delta_{m,n-1} I guess I should use orthogonality with the Legendre polynomials, but if I integrate by parts to get rid of the x my integral equals zero. Any tip on...

In textbooks these polynomials are not normally presented as an infinite series (the single variables are). What is the reason for this and are they equally allowed to be in infinite series form hence infinite order just like the single variable Taylor Polynomials? Or are there more issues about...

What are the ROots: x^4+4x^3+14x^2=-4x-13 ok the 13 really causes a problem because you can't factor that. So I move the right side to the left and then you can't find a number that fits so that it equals zero so I tried factoring it somehow but can't do it can someone help?

I was messing around with the \theta equation of hydrogen atom. OK, the equation is a Legendre differential equation, which has solutions of Legendre polynomials. I haven't studied them before, so I decided to take closed look and began working on the most simple type of Legendre DE. And the...

...and orthogonality relation. The book says \int_{-1}^{1} P_n(x) P_m(x) dx = \delta_{mn} \frac{2}{2n+1} So I sat and tried derieving it. First, I gather an inventory that might be useful: (1-x^2)P_n''(x) - 2xP_n'(x) + n(n+1) = 0 [(1-x^2)P_n'(x)]' = -n(n+1)P_n(x) P_n(-x) = (-1)^n P_n(x)...

I have two equations, I'm pretty sure I can solve them, but the method I know of is was too long, and I've never had to use very long methods to solve any problems so far. I'm wondering if there's some shortcut method that I don't know, or that I'm forgetting. Here are the equations(I have solve...

Need Some Help With Polynomials

Hi all, I've got this problem: Consider the points P such that the distance from P to A(-1,5,3) is twice the distance from P to B(6,2,-2). Show that the set of all such points is a sphere, and find its center and radius. I think the setup should be this: sqrt[(x+1)^2 + (y-5)^2 +...

Two questions, first, I solved something, but I was just playing around with the numbers, and I didn't really know what I was doing, nor did I really understand it after I was done. The question is as follows: When x + 2 is divided into f(x), the remainder is 3. Determine the remainder when x...

I had to relearn long division recently, because I just started division with polynomials in my math class. I realized that I didn't quite understand the whole process of long division. I can follow the steps that the teacher sets out, I just don't really understand the steps, why you use this...

Factoring polynomials(2nd problem) Factor: 36(2x-y)^2 - 25(u-2y)^2 Having trouble where to start...should I expand out?

Sometimes i like to waste my time observing the behavior of certain functions and identify any patterns. Most of the time i just look at the differences (absolute value) between two consecutive elements of a sequence of numbers and look for a pattern. If no pattern is evident i take the...

5 A particle moves horizontally in a straight line according to the rule x(t) = t^3 − 5t^2 + 3t − 5, 0 ≤ t ≤ 7 where x metres is its displacement to the right of the origin at time t seconds. a What is the initial position of the particle? b After how many seconds does the particle pass...

4 The height, x metres, of a diver above a swimming pool at time t seconds after he has bounced from the diving board can be modeled by the function x(t)= 3- 3t (3t^2/2) a How long, in seconds, after he has bounced from the diving board does the diver reach his maximum height? b What is the...

i wonder if there's a formula like for quadartic and cubic equations also for roots polynomials, like this equation: ax^(1/2)+bx+c=0 or like ax^(1/3)+bx^(1/2)+cx+d=0 ? and what are they?

Hi Given a function f(x) = sqrt(x) is the Taylor Polynomial of degree 2 for that function: \frac{x^2}{2} - 99x + 4901 where x = 100 ? Sincerely Fred

im teeching algebra and had to prove that X^5 - 8 was irreducible over the rationals. so i did it using eisenstein. then more generally i seem to have proved that X^n - a is irreducible over the rationals whenever it has no rational root. but i used galois theory, and the course I am...

First of all, do polynomials have asymptotes, including oblique ones? I know that rational functions have asymptotes, and it seems that most, if not all, of my book's exercises on this lesson contain only rational functions. So do polynomials have asymptotes? and if so, how do I determine...

Im stuck on this question :( The Hermite polynomials can be defined through \displaystyle{F(x,h) = \sum^{\infty}_{n = 0} \frac{h^n}{n!}H_n(x)} Prove that the H_n satisfy the hermite equation \displaystyle{H''_n(x) - 2xH'_n(x) + 2nH_n(x) = 0} Using...

I need some help. I fitted a 7th order legendre polynomial and got the L0 to L7 coefficients for different ANOVA classes. How can I get a back transformation in order to plot each class using the estimated coefficients? Thanks to anybody. Roberto.

If C is an m x n chessboard with m<=n. For a 0<=k<=m how many ways can we arrange k nonattacking rooks? and what is the rook polynomial r(C,k)?

Let S be a finite set of real numbers. What is a natural inner product to define on the space of all functions f:S->R? I want to approximate an arbitrary function with a polynomial of a fixed degree (both of which are defined only on S), and I want to use projections to do it, but I have no...

How does one find the roots of an equation, for instance: r^4 + r^3 - 7r^2 - r + 6 = 0 ...completely by hand. Is there some type of non-lengthy process or trick to find special circumstances for easy solving? Thanks.

Let T\in L(V). Let g(x)\in F[x] and let m(x) be the minimal polynomial of T. Show that g(T) is invertible \Leftrightarrow \gcd (m(x),g(x))=1. Backwards is easy. For forwards, suppose I say that g(T) is invertible implies that g(T)(v)=0 \Rightarrow v=0 and therefore g(x) prime, therefore it is...

some body who can explain for me the Legndre polynomials:eek: :eek:

I am stuck on this one polynomail factoring problem and I was wondering if someone could help me with it: 16a^2 - 24ab + 9b^2 - 25c^2 I tried factoring the first 3 terms as a trinomial but I'm not sure if that's what I'm supposed to do. What I wrote down so far is: (4a -5c)(4a...

I'm having trouble with this one factoring problem- x^2(a+b)-x(a+b)+(a+b) I thought it was 3 terms so I tried to do decomposition but it doesn't seem to work. If someone could just help me, I'd appreciate it. Thanks!

How do I get mathematica to multiply out a bunch of polynomials? Like (1-x)(34+x)(32-x). When I hit return it simply gives me what I wrote.