I've been able to do this before, but for some reason this isn't working.

d(x^3 - 2x + 4,x)

i get "Error: Dimension"

does anyone have any ideas as to why?

i also get the same error if i try

(integral) S(2x,x)

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- Oct 9th 2010, 03:15 PMRelmiwError when typing derivative into TI 89
I've been able to do this before, but for some reason this isn't working.

d(x^3 - 2x + 4,x)

i get "Error: Dimension"

does anyone have any ideas as to why?

i also get the same error if i try

(integral) S(2x,x) - Oct 9th 2010, 03:21 PMmr fantastic
- Oct 10th 2010, 03:53 AMRelmiw
ah, ok. i had x stored as a matrix, didn't know it was a problem to do that, and didn't know about the "clear a-z" option

i've got it figured out now though, thank you.