Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**cooljackiec****Member**- Registered: 2012-12-13
- Posts: 160

help:

I see you have graph paper.

You must be plotting something

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,363

Hi;

By the binomial theorem or Pascals triangle

Now just substitute for a and b

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

Offline

**cooljackiec****Member**- Registered: 2012-12-13
- Posts: 160

thanks

I see you have graph paper.

You must be plotting something

Offline

**cooljackiec****Member**- Registered: 2012-12-13
- Posts: 160

what is the coefiicencient of

inI see you have graph paper.

You must be plotting something

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,363

Hi;

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,294

hi cooljackiec

The term with c^3 will be

The term in (a+2b)^3 with ab^2 will be

So the coefficient you want will be:

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**noelevans****Member**- Registered: 2012-07-20
- Posts: 236

Hey cooljackiec!

You might google "multinomial coefficients" and check out some of the sites to see how to easily

obtain the coefficient of the ab^2c^3 term in (a+2b+3c)^6. I'm guessing that that is where bobbym

got his answer.

Writing "pretty" math (two dimensional) is easier to read and grasp than LaTex (one dimensional).

LaTex is like painting on many strips of paper and then stacking them to see what picture they make.

Offline

Pages: **1**