1. If f(x) = -x^3 + x +1/x, then f'(-1) =
2. The graph of y= 3x^4 - 16x^3 + 24x^2 + 48 is concave down for (Can't use calculator)
3. 1/2 (Integral Sign) e^t/2 dt =
What character should I make next? I'm looking for original characters like a sigon zealer or something related to that area, not the usual bvc,fb,pnb nec, etc.. I want one that can actually pk in duel games also =]
Post your characters!