How do I show that
Sum r=0 to n (-1)^r ncr=0??
Please how have tried and tried?
you can start with
nCr = nC(n-r)
the elements of the row are symmetric about the center.
And the are opposite in sign.
Sum r=0 to n (-1)^r ncr=0??
Please how have tried and tried?
nCr = nC(n-r)
the elements of the row are symmetric about the center.
And the are opposite in sign.