







Coefficients 
20131127 

kim pose la question : in the expression below, what number is the coefficient of y? y2+3y+4 Penny Nom lui répond. 





A parabola 
20120604 

Madeline pose la question : In a parabola, I need to know what "a" b and c determine. I think that a determines the width of the parabola, but I am not exactly sure what b, and c do. Robert Dawson lui répond. 





A fourth degree polynomial function with real coefficients 
20101030 

Ryan pose la question : Question from Ryan, a student:
What is the fourth degree polynomial function with real coefficients
that has 1,1 and I as zeros and such that f(x)=160 Harley Weston lui répond. 





A polynomial with integer coefficients 
20101023 

Adori pose la question : Question from Adori, a student:
Find a polynomial with integer coefficients that has the given zeros: 2/3, 4, root of 3i, root of 3i. Harley Weston lui répond. 





Constants and coefficients 
20100312 

lourdes pose la question : identify the coefficients, constant term(s), and like terms of the expression.
8x + 9  3x
17  2a + 5a  1
7m  7 + 6m  6
10 15r 22r + 8 Penny Nom lui répond. 





Coefficients 
20091117 

Da'mon pose la question : The Coefficients of the expression 8  5x  4 + 3x are 5 and 3
Whether the statement is true or false. Penny Nom lui répond. 





Leading terms and leading coefficients 
20090331 

Susan pose la question : Write the polynomial P(x)=x^33x^4+17x+114/3x^2 in descending order. Identify the leading term and the leading coefficient. Penny Nom lui répond. 





Constants, and coeficiants 
20090110 

Kelsey pose la question : I am having trouble trying to remember what like terms, constants, and coeficiants are. My math teacher
hasent been explaining it very well and i was wondering how to remember what they are, and what they are? I dont understand the concepts. Stephen La Rocque lui répond. 





Coefficients, Like Terms, and Constants 
20080814 

Maddie pose la question : How Would I Answer This Problem?

Coefficients 
Like Terms 
Constants 
3x+7 



4m+(3n)+n 



6kp+9k+kp14 



8y+6ab+73ba 



c+2c+c5c+1 



I Would Really Appreciate It If You Could Help Me
Sincerely,
Maddie Penny Nom lui répond. 





n choose r equals n1 choose r plus n1 choose r  1 
20080714 

fae pose la question : Prove that
( n ) = ( n – 1) + ( n  1 )
( r ) ( r ) (r1)
NOTE: the ( ) should be one for n taken r and so on. but there is no one big ( ) that will cater two lines Janice Cotcher lui répond. 





A quadratic equation with odd coefficients 
20080415 

Manashi pose la question : If p,q,r be any odd integers, then prove that the roots of the quadratic equation px^2+qx+r=0 can't be rational . Stephen La Rocque lui répond. 





Coefficients 
20061102 

Kilihea pose la question : How do you factor the following expression so that the coefficient is 1? 4x+8 and 3x27 Haley Ess lui répond. 





Prove that 2nCn is less than 4n, for all positive integers n? 
20061001 

Anna pose la question : How can I prove that 2nCn is less than 4n, for all positive integers n? Penny Nom lui répond. 





What are the 3rd and 4th terms of (2xy)^7? 
20060618 

April pose la question : What are the 3rd and 4th terms of this sequence: (2xy)^{7}?
I'm having an issue with this...is there any easier way to get it without completely factoring the whoooole thing out? Penny Nom lui répond. 





Coefficients, constants and like terms 
20051005 

Elizabeth pose la question : In the equation 8y+6ab+73ab what are the coefficients; the like terms and constants? Penny lui répond. 





Binomial distribution 
20031217 

Lesley pose la question : my daughter is having difficulty with the following formula
P(X=x) = ( n over x) px (1p) nx
The teacher has given them the formula but not taught them how to apply it or understand it. Penny Nom lui répond. 





Newton's binomial theorem 
20030830 

William pose la question : According to page 126 of Murtha & Willard's "Statistics and Calculus" (PrenticeHall, 1973), Newton's binomial theorem can proved inductively. I suppose that was his method, which I would like to see. Penny Nom lui répond. 





Successive coefficients in Pascal's Triangle 
20021227 

Quincy pose la question : There is a formula connecting any (k+1) successive coefficients in the nth row of the Pascal Triangle with a coefficient in the (n+k)th row. Find this formula Penny Nom and Walter Whiteley lui répond. 





A complex quadratic 
20021006 

Michael pose la question : I would like to know, how to solve this Complex number: quadratic equation. ix^{ 2} + x i = 0 Harley Weston lui répond. 





Successive coefficients in the nth row of Pascal's Triangle 
20020610 

Tim pose la question : There is a formula connecting any (k+1) successive coefficients in the nth row of Pascal's Triangle with a coefficient in the (n+k)th row. find this formula. Penny Nom lui répond. 





Pascal's Triangle 
20020402 

Brian pose la question : It's about (a+b)^{x}. I remember there a triangle with numbers to remember for a faster solution. Can you please teach me? Penny Nom lui répond. 





A degree 5 polynomial 
20020217 

Carla pose la question : Write an equation for a polynomial of degree 5 given the following zeros: 7+3i, 2+sqrt(13), 6 Penny Nom lui répond. 





Undetermined coefficients 
20011122 

Hoda pose la question : The equation is: y"  2y' + y = t e^{t} + 4 We need to use The method of Undetermined coefficients. I have tried assuming that the solution is Ate^{t}+Be^{t}+C, but all I get is C=4 and I tried (At^{2}+Bt+C)e^{t}+D, but again I get 0=0 when I calculate the first and second derivatives, so i get no information on the constants. Any suggestions? Harley Weston lui répond. 





Lucas' theorem 
20011009 

Tania pose la question : How could I demonstrate: nCp is congruent to floor(n/p) (modulo p)? where rCk is a binomial coefficient, rCk = r(r1)...(rk+1)/k(k1)...1, and p is a prime number Richard McIntosh lui répond. 





A quadratic function 
20010510 

A parent pose la question : A quadratic function is given by f:xax^{2}+b
If the two points A(2, 2) and B (0, 8) are on the graph of the function, then find a and b. Penny Nom lui répond. 





A dollar, quarter, dime, nickle and penny 
20010107 

Sarah pose la question : Arnold has a dollar coin, one dime, one quarter, one nickel, and a penny. The number of different sums of money that can be formed using three coins is... Penny Nom lui répond. 





649 
20000914 

Steve pose la question : In our state lottery you must choose 6 numbers (149). How many different combinations are there? They can be in any order. Harley Weston lui répond. 





Binomial coefficients 
20000321 

Howard Lutz pose la question : How do you find each successive numerical term in this equation y+dy=(x+dx)^{5} =x^{5}+5*x^{4}dx+10*x^{3}(dx)^{2}+10*x^^{2}(dx)^{3}+5*x(dx)^{4}+(dx)^{5} I would appreciate an explanation of the method to find the numeric coefficient in a binomial expansion Penny Nom lui répond. 





Multinomial coefficients 
19991203 

Suraj Das pose la question : Is there a formula for the expansion of (a+b+c) to the nth power? Does it have to do with Pascal's triangle? Penny Nom lui répond. 





Cannonballs 
19990127 

Roger King pose la question : How many cannonballs can be stacked in a triangular pyramid? Penny Nom lui répond. 





What's the next term? 
19981112 

Ilia pose la question : What the formula and explonation for formula for next patterns: 1) 1, 4, 10, 20, 35, 56, 84,... 2) 0, 6, 30, 90, 210, 420,... Thanks! Penny Nom lui répond. 

