Offers a new high-resolution LC display with 192×63 pixels and a resolution that is four times higher than that of the familiar displays of the FX-ES Plus series.
![Casio Fx-991ex Manual Casio Fx-991ex Manual](/uploads/1/2/5/6/125634458/185527587.png)
History is gone when powered off.variables stored in memories remain. Wish I could define f(X) in table, and use it in calculate mode to solve for roots or solve d f(X)/dx to find max/mins without having to retype the function in. Wish I could do the reverse process as well. That said, solve is great.
I can do solve d/dx, then delete the d/dx and hit = to get the f(X) value for where d/dx = 0. ( 03:14 PM)lrdheat Wrote: On the JP900, this procedure produces a syntax error upon providing a guess.It's surprising because the manual doesn't say anything about that while Casio usually does mention that d/dx and integral are prohibited within solver, as in the manuals for the fx 5800p, fx 991 ms for example.Was Casio desperately hunting for bytes for it's jp900? It would have been better to leave table of periodic elements.?In the 5800p I ended up implementing a simple secant solver in those cases.