Hello, on HP Prime, when i enter in CAS mode :

deSolve(y+2E-3*y'=0 AND y(0)=10,y)

I get an error "bad arguments".

How to define the diff operator ' or diff() ?

Is there a special key to ' ?

Thanks for your help.

JC

(01-01-2014 04:57 PM)jc_63 Wrote: [ -> ]Hello, on HP Prime, when i enter in CAS mode :

deSolve(y+2E-3*y'=0 AND y(0)=10,y)

I get an error "bad arguments".

How to define the diff operator ' or diff() ?

Is there a special key to ' ?

Thanks for your help.

JC

In CAS mode, use 2*10^(-3) and not 2E-3.

It's OK when i enter :

desolve(y+2E-3*diff(y)=0 AND y(0)=10,y)

> 10*e^(-500*x)

y' is not correct !

Thanks,

JC

I've found : the ' is in Chars (Shift Vars) and y' is correctly coded as diff().

With Shift 9, the ' is not the same but minute (angle unit).

It is a source of error !

JC

(01-02-2014 09:04 PM)jc_63 Wrote: [ -> ]I've found : the ' is in Chars (Shift Vars) and y' is correctly coded as diff().

With Shift 9, the ' is not the same but minute (angle unit).

It is a source of error !

JC

An easier way to get ' is to use [Shift][ () ] and delete the extra tic mark.