SOLUTION: n-1cr-1 +ncr-1=ncr

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Question 1045420: n-1cr-1 +ncr-1=ncr
Found 2 solutions by ikleyn, robertb:
Answer by ikleyn(52782) About Me  (Show Source):
You can put this solution on YOUR website!
.
The Morse code.

Can you explain in a human language what do you want ?


Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
If you are trying to prove , then forget it, it's not true.

For instance, .

What is true is the relation

,

which is the basis for Pascal's Triangle.