I studied boolean in electronics but it has been years since I used it. But there are some references to in posts search for Boolean Algebra and here is a link to Wiki that gives a explantions to boolean.

http://en.wikipedia.org/wiki/Boolean_algebra_(logic)

hope this helps

Raider0451

]]>I love Algebra and Calculus!!

I hate estimating and probability = [

]]>[Dickinson]a^2b + ab^2 + b^2c + bc^2 + c^2a + ca^2\\\\

=\ (a+b)(b+c)(c+a) - 2abc\\\\

=\ (a+b+c)(ab+bc+ca) - 3abc[/Dickinson]

And this.

[Dickinson]a^3 + b^3 + c^3\ =\ (a + b + c)^3 - 3(a + b + c)(ab + bc + ca) + 3abc[/Dickinson] (slightly different from Ganeshs formula)

]]>2. If a+b+c = 0,

3. (i)

is divisible by (x-a) for all values of n.

3. (ii)

is divisible by (x+a) for all even values of n.

3.(iii)

is divisible by (x+a) for all odd values of n.]]>

If

which is called the componendo.

If

which is called dividendo.

If

which is called the componendo & dividendo.]]>

(a+b)^c = sum starting at k=1 to infinity((v choose k) x^k a^(v-k))

I couldn't get that to work in LaTeX.

]]>

N2 = square number

√ = square root

Tn = triangle number

(-1+√(8n+1))/2= triangle root]]>

Triangular Numbers: Definition of Triangular Number

Combinations: Combinations and Permutations

Hope they help!

(But we may need to delete this conversation as it is in the formulas )

Oh -- Oops! Sorry. That means I can only write brilliant formulas. OK

Thanks for the tolerance. Delete.

Combinations: Combinations and Permutations

Hope they help!

(But we may need to delete this conversation as it is in the formulas )

]]>Welcome to the forum and thanks for posting what you think of the forum!

The series 1, 3, 6, 10, 15 has the first term (lets call it 'a' for convenience) as 1 and thereafter, the difference between the nth term and (n-1)th term is n. That is, the difference between the 3rd and 2nd term is 3, the difference between the 4th and the third terms is 4 and so on. Thus, the 2nd term is 2+a, the third term is 3+(2+a), the fourth term is 4+[3+(2+a)]. It can be seen that the nth term is.

They form a series of numbers which are the sum of the first n natural numbers.

]]>More to the point, how do I find all possible UNIQUE triple-dip combinations of ice cream cones. I know the formula for double-dips, but darned if I can't figure this one out.

Any help?? I am humbled by all of your brilliances.

Thank you -- K

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