Hi experts,

I have 9860GII, is there any possibility to solve here expressions for concrete numbers ?

Example: I write X^4 + X/2 + sin(X) and want to instate value in X

if I instate pi, it will write 98,98988 or if I instate 3 it will show 82,64112

I wasnt succesfull to find it in the manual, so thanks for ideas or any help.

Thanks much for any related answer

First of all, thanks for your idea, it really works

But in my previous calculator, there was a "SOLVE" function, that asked for the unknowns values and then solved the whole expression without setting the unknowns before.

Isnt there a simpler method, how to solve it (i found the method of continuous instating quite slow) ?


// edit: your post had dissapeared maybe a little bug ?

There's several ways to do this, but here's one. Just write the formula as you normally would.



If you want to figure out which X would give the answer 89, you move the answer into the right side of the forumula (changing the sign) and solve for 0.

Tips: I first copied the formula using + (Clip) + (Cpy-L), then + (Paste) then inserted the formula from + (Calc) + (Solve)




Your calclator has two solve functions, in this instance I used Solve which finds the first answer, but you also have on the GII a SolveN function which tries to find several answers. The screenshots are from the fx-8690 emulator and is missing the usefull SolveN() function.






Yeah, it was missing 50% :-)

Hope the final answer helps.