07-09-2015, 08:20 PM

Hello, I bougt a HP Prime calculator on Amazon. Unfortunately it is not here yet, but I got the emulator to get used to it. I like the emulator pretty much and hope the calculator will get here fast, I can't wait .

Well, I guess I found a bug in the CAS. I have not found any information about this bug somewhere else so I am not sure if it is a bug or if I am using the calculator wrong. Using the fsolve() function I was trying to find some intersections. Then I wanted to see how far I could go. So I entered some pointless equations.

What I endet up was:

fsolve(SIN(x)=0.05*x+1,x,(-50)..50)

The results seemed to be fine. The problem I found out occurs when I enter bigger ranges.

For example:

fsolve(SIN(x)=0.05*x+1,x,(-200)..100)

It doesn't give me all intersections.

Using this line I get all the intersections.

fsolve(SIN(x)=0.05*x+1,x,(-200)..200)

So the output of the calculator varies if I enter to big ranges. If the range is to big I only get one result.

It doesn't seem to set limitations.

I hope someone can help me.

The calculator is selled since 2013 and Updated frequently. So I guess HP is working still on it aren't they? I heard about some other bugs which are fixed mostly. Is there somewhere some information from HP about future updates?

Sorry if my english skills aren't perfekt. I hope didn't made that much mistakes .

-------------------------------------------

Edit: So I got my calculator today. This issue still occurs on the hardware.

Greetings

Well, I guess I found a bug in the CAS. I have not found any information about this bug somewhere else so I am not sure if it is a bug or if I am using the calculator wrong. Using the fsolve() function I was trying to find some intersections. Then I wanted to see how far I could go. So I entered some pointless equations.

What I endet up was:

fsolve(SIN(x)=0.05*x+1,x,(-50)..50)

The results seemed to be fine. The problem I found out occurs when I enter bigger ranges.

For example:

fsolve(SIN(x)=0.05*x+1,x,(-200)..100)

It doesn't give me all intersections.

Using this line I get all the intersections.

fsolve(SIN(x)=0.05*x+1,x,(-200)..200)

So the output of the calculator varies if I enter to big ranges. If the range is to big I only get one result.

It doesn't seem to set limitations.

I hope someone can help me.

The calculator is selled since 2013 and Updated frequently. So I guess HP is working still on it aren't they? I heard about some other bugs which are fixed mostly. Is there somewhere some information from HP about future updates?

Sorry if my english skills aren't perfekt. I hope didn't made that much mistakes .

-------------------------------------------

Edit: So I got my calculator today. This issue still occurs on the hardware.

Greetings