Homework Help: Discrete math

Posted by Genie_math on Wednesday, October 3, 2012 at 8:49pm.

I need to find the coefficient of x^18 y^32 in (x+y)^50.

I understand that we have to use the binomial theorem. I know how to
find the coefficient for example x^18 but here we have "x" as well as
"y" which I have no idea about.

Discrete math - Reiny, Wednesday, October 3, 2012 at 8:54pm
general term(r+1)
= C(50,r)(x^(50-r) y^r

comparing this with ? x^18 y^32 we can see that r = 32
so we want C(50,32) which is 1.80535 x 10^13
Discrete math - Genie_math, Wednesday, October 3, 2012 at 9:05pm
How many monomials appear in the expansion of (x + y + z)^75?

Answer this Question

Related Questions

Chemistry - .50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 ...
Chemistry(Please check) - .50 - x / x = 3.20e-1 I need to solve for x. I was ...
math 115 - i am trying to find this answer there are 3 questions. 1. micheal ...
Discrete Math - Solve the recurrence relation a_n = -6a_n - 1 + 7a_n-2, n &#...
MATH!!! - Find the five-number summary of the following set of numbers. 0.16, 0....
Math - I have some problems that I dont understand. Please help me. Solve the ...
math - Hi, I am trying to solve a problem using Chebyshev's Theorem. The ...
Math(Please respond) - .50 - x / x = 3.20e-1 I need to solve for x. I was going...
Mat115 - 46. Find the five-number summary of the following set of numbers. 0.16...
math, finite mathematics - My question is that i need help for this problem ...

For Further Reading

First Name:
School Subject:
Answer: