Troubleshooting HP50G Syntax Errors for MSOLV

[Clutch Cargo]

I recently purchased an HP50G as I caught my TI-89 giving me incorrect results when solving simultaneous equations. However I can't get the 50G to do anything but tell me invalid syntax. I am using MSOLV as follows:

MSOLV('[x/60+x/15+(x-y)/5-15=0][y/2+(y-x)/5+5=0][x,y]

This is the syntax copied straight out of the users guide. Can anyone tell me what I am doing wrong?

 

[Integral]

I recently purchased an HP50G as I caught my TI-89 giving me incorrect results when solving simultaneous equations. However I can't get the 50G to do anything but tell me invalid syntax. I am using MSOLV as follows:

MSOLV('[x/60+x/15+(x-y)/5-15=0][y/2+(y-x)/5+5=0][x,y]

This is the syntax copied straight out of the users guide. Can anyone tell me what I am doing wrong?

Looks like you may need a set of square brackets inclosing the entire matrix.

Is the HP able to correctly close the opening paren and tick mark?

 

[Clutch Cargo]

I've tried that along with apostrophes before and after the square brackets as shown in the HP users guide. You have heard of Moore's law, well there is also a Mathieson Law that I came up with years ago: it states that user friendliness is inversly proportional to functionality. The HP50G proves that point.,

 

[Mech_Engineer]

I recently purchased an HP50G as I caught my TI-89 giving me incorrect results when solving simultaneous equations.

I wonder, was it the machine's fault, or operator error? In the end, a calculator is only as smart as the person using it. What simultaneous equations were you trying to solve?

 

[Bill_B]

Hmm... My user's guide lists a different syntax. Try

MSOLV('[x/60+x/15+(x-y)/5-15=0 , y/2+(y-x)/5+5=0]' , '[x,y]', '[0,0]')

I get 60,10

 

[Clutch Cargo]

I am much happier with my TI-89 Titanium. I should put my HP on e-bay.

Besides, there are a number of good programs written for the 89.

 

[pfinch]

For the HP 50

1. How can I get answers displayed as fractions rather than decimal ?

2. How can I convert decimals to fractions

 

[Bill_B]

For the HP 50

1. How can I get answers displayed as fractions rather than decimal ?

2. How can I convert decimals to fractions

1. Go to MODE, then CAS, then uncheck APPROX. This will make the calc output exact fractions, rather than decimal approximations.

Personally, I keep my calc in this mode and use RSHIFT ENTER to convert from fraction to decimal as needed.

2. LSHIFT 6 (convert), then choose REWRITE, then ->Q to convert from decimal to fraction.

 

[Adrian4English]

Some help please.
I'm writing a units application and I want to convert cubic meters /day into millions of cubic meters a gear. The first one is easy '1_m^3/d' but when I try '1_Mm^3/yr' it gets interpreted as 'million meters cubed per year.
I've tried putting brackets i.e. '1_M(m^3)/yr' and '1_M(m^3/yr)' but this results in nonsence.
I seem to remember reading about how to solve this problem in my old HP48sx manual, but I have long since lost that!
Has anybody got a solution?
Adrian

 

[rs1n]

I recently purchased an HP50G as I caught my TI-89 giving me incorrect results when solving simultaneous equations. However I can't get the 50G to do anything but tell me invalid syntax. I am using MSOLV as follows:

MSOLV('[x/60+x/15+(x-y)/5-15=0][y/2+(y-x)/5+5=0][x,y]

This is the syntax copied straight out of the users guide. Can anyone tell me what I am doing wrong?

There is not an MSOLV command; there _IS_ an MSLV command. The syntax is:

MSLV( '[x/60+x/15+(x-y)/5-15=0, y/2+(y-x)/5+5=0]' , '[x,y]' , [0,0] )

There are three arguments: '[ list of equations ]' , '[ list of variables ]' , [ list of initial values ]

I hope that is what you needed.

Han