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Message: Emoticon Listing HTML Help	[quote]1. TRIANGLE NUMBER variable(N),: 3 FORMULA: = =1/2N(N+1) =1/2(3)(3+1) =6 Picture: <img src=http://img115.exs.cx/img115/4692/segi1ec.png> question: where do we get the 1/2N(N+1)formula? Prove it. ============================================= 2. PASCAL TRIANGLE variable(N),:3 Picture: <img src=http://img115.exs.cx/img115/212/segipas5uv.png> question: how can we get the 2^(n-1)formula?Prove it. ====================================================== [/quote]
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redXI

I Need your help please...everybody!!
replied on: 3/9/2005 8:10:00 PM

1. TRIANGLE NUMBER
variable(N),: 3

FORMULA: =
=1/2N(N+1)
=1/2(3)(3+1)
=6

Picture:

question: where do we get the 1/2N(N+1)formula? Prove it.
=============================================
2. PASCAL TRIANGLE
variable(N),:3

Picture:

question: how can we get the 2^(n-1)formula?Prove it.
======================================================