T tradewind Member Joined Mar 22, 2004 Messages 51 Location north west sydney Apr 3, 2004 #1 how do i differentiate this h= 1 + x - x^2/40
C CM_Tutor Moderator Moderator Joined Mar 11, 2004 Messages 2,642 Gender Male HSC N/A Apr 3, 2004 #2 h = 1 + x - x<sup>2</sup> / 40 dh/dx = 0 + 1 - 2x / 40 = 1 - x / 20