F flakine Junior Member Joined Aug 24, 2005 Messages 78 Sep 6, 2005 #1 f(x)=(x+1)^2; x=a, x=a+h Is this correct: ((a+h) +1)^2-(a+h)^2/((a+h)-a) (a+h)^2+2(a+h)+1-(a+h)^2/h 2(a+h)+1/h ????
f(x)=(x+1)^2; x=a, x=a+h Is this correct: ((a+h) +1)^2-(a+h)^2/((a+h)-a) (a+h)^2+2(a+h)+1-(a+h)^2/h 2(a+h)+1/h ????
pka Elite Member Joined Jan 29, 2005 Messages 11,978 Sep 6, 2005 #2 It should be: (a+h)<SUP>2</SUP>+2(a+h)+1-(a+1)<SUP>2</SUP>/h. That is, not (a+h) but (a+1).
F flakine Junior Member Joined Aug 24, 2005 Messages 78 Sep 6, 2005 #3 My mistake! How 'bout: ((a+h) +1)^2-(a+1)^2/(a+h)-a a^2+2ah+h^2+2a+2h+1-a^2-2a-1/h h(2a+h+2)/h 2a+h+2 ???
My mistake! How 'bout: ((a+h) +1)^2-(a+1)^2/(a+h)-a a^2+2ah+h^2+2a+2h+1-a^2-2a-1/h h(2a+h+2)/h 2a+h+2 ???
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,550 Sep 6, 2005 #4 The answer looks good to me. Eliz.
