Sharp EL-W516X Calculation Examples Manual

[lrdheat]

Take this function: (5000*(1-e^(-x/20))-200*x). Go to num-solv and directly make the equation
0=d/dx(5000*(1-e^-x/20)-200*x)|x=x. Hit enter. This takes you to the solve template. Enter, say, 3, and solve for x. It will correctly come up with the critical point (happens to be a maximum) of ~4.46. Pick quit. Go directly back to num-solv. Put curser over d/dx and press delete. This takes away d/dx, leaving rest of equation intact. Put curser over the 0 and press x, press again cycling through to get a y. Hit enter. This takes you back to solve template. Leave your x which is populated with the critical value, and solve for y. It comes up with the correct value of ~107. If you wish, press quit. Press x, enter, critical value appears. Press y, enter, y value of critical x appears.

So far, it works on what I've tried without balking. Note that this example did not have to resort to rewriting in terms of (20root of e)^_x.

Pretty cool.

Also nice on 36pro is that cross and dot products of 2D and 3D vectors is supported. Nice probability distributions as well.

Amazing value for ~$20