January 10th, 2007, 02:03 PM  #1 
Newbie Joined: Dec 2006 Posts: 28 Thanks: 0  Fourth term
find the fourth term of (x + 2y)^6

January 10th, 2007, 02:23 PM  #2 
Senior Member Joined: Nov 2006 From: I'm a figment of my own imagination :? Posts: 848 Thanks: 0 
In the general equation (a+b)^x, the (n1)th term is xCn[a^(xn)][b^n], where nCa is equal to x!/[n!(xn)!] (where x!=x(x1)(x2)...*3*2*1 for all positive integers x, and 0!=1).

January 28th, 2007, 09:37 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,966 Thanks: 2216 
That formula was for the (n+1)th term.


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