Revision as of 16:02, 1 October 2009 by Smartguy(talk | contribs)(Created page with 'Let <math>S=(x-1)^4+4(x-1)^3+6(x-1)^2+4(x-1)+1</math>. Then S equals: (A) <math>(x-2)^4</math> (B) <math>(x-1)^4</math> (C) <math>x^4</math> (D) <math>(x+1)^4</math> (E) <math>x…')