Calculators Messed up my TI-89 somehow, don't want to reset, any suggests for {}?

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The user encountered an issue with their TI-89 calculator, where long answers were displayed as empty braces ({}). The problem was traced back to the variable "w" being redefined to represent the wronskian due to the loading of external programs. The user resolved the issue by switching to a different variable. Additionally, there was a discussion about the necessity of differential equations, particularly in the context of understanding relationships between variables in physics, such as force and acceleration. The user expressed confusion over the differences between force equations and the implications of time-dependent variables, highlighting the complexity of these concepts in calculus and physics.
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Messed up my TI-89 somehow, don't want to reset, any suggests for {}??

I don't know what I did, but now anytime my answer is going to be long, I get {} as an answer, nothing in between. Any thoughts?

:(
Angela.
 
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Ok, it's only with variables other than x, like w.
 
amb123 said:
I don't know what I did, but now anytime my answer is going to be long, I get {} as an answer, nothing in between. Any thoughts?

:(
Angela.

Ok, sorry guys, I have found the problem. Someone loaded programs into my calculator and w now stands for wronskian, i'll need to use another variable.

thx.
Angela.
 
Can someone tell me why differential equations are needed?
I can calculate with integrals. There I know that I can calculate the Area.

F=m*a in F=d(m*v)/d(t) or something like that.
where's the different if I write F=m*a or F=d(m*v)/d(t)
Can somebody explan me that (and explain me, why m*a=d(m*v)/d(t))
(I know that a=s/t^2 and with that a=v/t)
Sorry for all these questions. arghh
 
because in general x, v, a, m,... are not constants, they are time dependend (amongs other things).
 

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