Partial Derivation with the TI-NSpire CX CAS

Question

I am trying to perform a partial derivation with the TI-NSPIRE CX CAS. However, a variable is always output as 0 in the result.

Example with the nspire: d/dx(yx) = 0

But I would expect "y" as a result here.

Wolfram gives the expected result as example. How do I enter in the calculator that y is considered as a variable?

I dont know, mine works correctly and im getting "y". Are you sure you didnt set the value of "y" to 0 prior to derivate? — fragg, Jan 01 '20 at 23:11

score 1 · Accepted Answer · answered Jan 01 '20 at 23:30

1

You forgot that there is no implicit multiplication. Use x*y not xy

answered Jan 01 '20 at 23:30

soegaard

1 Answers1