CASIO CLASSWIZ fx-991EX

[lrdheat]

If one wanted to find another extremum, I just discovered that by going back to what is now f(x), it can easily be made back into d/dx of f(x) by taking the curser to the front of the equation and, using insert, put in d/dx. then go to end and make it where "x=x" =0, and press solve, enter in your next guess for an "x".

Without inserting d/dx at the beginning using insert, one has to re-enter the whole thing all over again to find new points of interest.

Neat!