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Casio calculator

Does anyone have an issue with the classwiz casio fx-991cw ? My calculator can not do Normal CD if one of (lower limit or upper limit is unknown) and gives me a math error

I tried using different definitions for + infinity and - infinity but nothing worked as well as resetting it and nothing worked please help

Reply 1

Original post
by HamzaELhamouz
Does anyone have an issue with the classwiz casio fx-991cw ? My calculator can not do Normal CD if one of (lower limit or upper limit is unknown) and gives me a math error
I tried using different definitions for + infinity and - infinity but nothing worked as well as resetting it and nothing worked please help

All right, so the Casio fx-991CW is a great calculator but it can be a bit finicky when it comes to some stats stuff, like Normal CD when you don't know one of the limits. It requires both bounds to do the calculations, and if you leave one blank (or try to plug in infinity), it’s mostly likely just going to return an error.
Here's what you can try:
Use a really big number for infinity: If you refer to infinity, put a huge positive number (10^99) if positive infinity, a huge negative number (-10^99) if negative infinity. It may trick the calculator into functioning.
Bye,
Sandro

Reply 2

Original post
by Nitrotoluene
All right, so the Casio fx-991CW is a great calculator but it can be a bit finicky when it comes to some stats stuff, like Normal CD when you don't know one of the limits. It requires both bounds to do the calculations, and if you leave one blank (or try to plug in infinity), it’s mostly likely just going to return an error.
Here's what you can try:
Use a really big number for infinity: If you refer to infinity, put a huge positive number (10^99) if positive infinity, a huge negative number (-10^99) if negative infinity. It may trick the calculator into functioning.
Bye,
Sandro


Hi Sandro, thanks for getting back to me. I did try it but still nothing worked. I might just buy another version or so

Reply 3

Original post
by HamzaELhamouz
Hi Sandro, thanks for getting back to me. I did try it but still nothing worked. I might just buy another version or so

I also think you should buy another version or brand or so.
Bye,
Sandro

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