CSAIO fx-9860GII

[lrdheat]

The CASIOGII is quite a nice calculator. Better fit for shirt pocket than HP 39gii, TI 84SE. Graphing also easiest of the three as the analysis of the graph can be accomplished easily on screen with soft key selections. In addition to roots, local max/mins, and area under the curve, an "x" value can be entered to obtain f(x), and a "y" value can be entered to obtain the x value that corresponds to it. The up/dow/left/right control pad can be used to immediately jump to next root, or next local min, or next local max of the graph. Not documented as far as I could see, but excellent is that full accuracy area under the curve from say, one root to the next, or from one local min to the next can be accomplished. The "x" coordinate of say, a root, cannot be saved in the graphing environment, but if you obtain a root of interest in the graphing environment, then go to home screen (F1 on menu), press "x". this will have the "x" coordinate of your point of interest. Store it to a variable of choice such as "A". Go back to graph and find your next point of interest. Go back to home and press "x" and store it to , say, "B". Go back to graph. Now choose area under curve selection, enter "A" as your lower limit, "B" as your upper limit, and execute.

Integrals can be entered into graphing as well, and analysis can be done.

Nice selection of distributions including geometric and hypergeometric, and inveres for all of the distributions.

Regression choices include a sin regression.

Much more to explore.

$80 vs $125 for the TI 84SE, similar for HP 39gii