Say I have this function defined using Func
:
Define f(x)=Func
Return x²
EndFunc
I can use this function in most cases perfectly fine:
f(2) © 4
f(3)+f(4) © 24
cos(f(sqrt(π))) © -1
expand(f(x+1)) © x²+2⋅x+1
However, when I try to use this function in solve
or cSolve
(possibly some other functions as well), it doesn't work as expected:
© I expected 'x=-2 or x=2'
solve(f(x)=4,x) © f(x)=4
© I expected 'x=-2⋅i or x=2⋅i'
cSolve(f(x)=-4,x) © f(x)=-4
It doesn't seem to expand/evaluate the function call and leaves it as f(x)
.
On the other hand, if I don't use Func
, it works perfectly fine:
Define g(x)=x² © Done
solve(g(x)=4,x) © x=-2 or x=2
cSolve(g(x)=4,x) © x=-2⋅i or x=2⋅i
nSolve
works for both f
and g
as intended, so this makes me think it's something to do with symbolic computations.
Func
(so I can use local variables and things like that) that still work with functions like solve
and cSolve
?I'm using a TI-Nspire CX CAS Handheld (the older one, not the CX II).
I contacted customer support and they responded with
There is not a way to use the function defined the way you did using "func" and "return" with the solve command.