11-02-2019, 12:54 PM

I am back again，This article Mainly about CAS

(i)

Enter in the HP Prime CAS interface

Then click Show and the calculator will restart.

(ii)

Regarding the multivariate function to find partial derivatives, hp prime does not work well.

Input
Calculator output

(iii)

-LambertW() function is not supported enough

E.g

The result is returned as it is.

(i)

Enter in the HP Prime CAS interface

Code:

`plotfunc(x^(2*ln(x)),x)`

Then click Show and the calculator will restart.

(ii)

Regarding the multivariate function to find partial derivatives, hp prime does not work well.

Input

Code:

`simplify(diff(f(r*cos(α)*cos(β),r*sin(α)*cos(β),r*sin(β)),r))`

Code:

`"Expression used like a function diff(f,2)`

You should write subst(diff(f,2),f,r*cos(α)*cos(β),r*cos(β)*sin(α),r*sin(β)) 错误: 宗量值错误"

(iii)

-LambertW() function is not supported enough

E.g

Code:

`diff(LambertW(x),x)`

Code:

`plotfunc(LambertW(x),x)`