| I keep doing the math over and over again to find the second derivative of past 6c, but it NEVER comes out right. Maybe one of you can point out my foolishness (luckily, its the only mistake I made all test).
For simplicity, yd=first derivative, ydd=second derivative
yd=-2 (that I know for fact...at least I hope so)=3y/4-y^2/8
ydd=3yd/4 - 2y*yd/8 = 3*(-2)/4 - 2*8*(-2)/8=-3/2 + 4 = 5/2
The answer however, when I integrate and then differentiate is 1/2.
Besides some stupidity I just can't see yet, thought it was an amazing test. |