For the next one.
Let x=1 & y=1.
Questions:
a) Suppose that r and n are integers with .
Show that
b) If n is a positive integer,
Show that
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My attempt so far:
a)
Ugh! Any ideas where I could go from here?
b)
which is clearly wrong.
Please help! Thank you!
No, I get that. It's just the goes to nC1 + nC2 +....+ nCn bit I didn't understand - if you understand what I'm saying. :
All is well now, I had to look it up in one of my old high-school textbooks, and I get it now.
Sorry for the confusion on the last bit. You were extremely helpful, yet again. Thanks.