Texas Instruments TI-83 Plus Calculator "undefined" Questions

...any equation after inputting diff( to find the gradient function it gives me an answer that reads undefined. E.g. Diff(ln(x)) gives the answer undefined. I have tried all the possible ways to do

undefined variable It says undefined variable when I try to graph anything. Why is this? what did I mess up, and does this have anything to do with clearing the variables? go to home and type Define x

undefined variable error M calculus teacher told me that I needed to disable plots. I did a statistics problem involving plots. And I have cleared the plots. However, now, when I enter a function in ...

Suddenly, the graph window reports ERR:UNDEFINED (1) Suddenly, the graph window reports ERR:UNDEFINED 1:QUIT for anything (e.g., y=2x+1) that I try to graph. This problem started after I deleted the ...

I just got the TI-Nspire. I'd like to solve a problem with undefined variables using Negative Exponent and things like the Expanded Power Rule. The Nspire will not let me store "x" as a variable. How ...

...gives me 100. I (and a few math teachers) have done this many times by hand, and we all get undefined as an answer. Why is the calculator getting the wrong answer? Hello, The derivative of

...graph goes to infinity and negative infinity as the x nears 7. This is because the function becomes undefined at x = 7 , plug 7 into x and we get 1/0, dividing by zero is undefined. Thus, the ...

Difficulties with producing a Residual plot. I keep getting "Undefined Variable". Can you please help? In your calculations you are using a variable which stores a numerical value. In the HOME screen,

"Undefined" as answer to an inverse sine calculation I am attempting to calculate the inverse sine of 50.8 and 60.3 for a couple of physics problems, but the calculator keeps on returning "undefined" ...

Integrating 1/root(10-x^2) from -root(10) to root(10) gives pi on the TI-89 but gives undefined on the platinum TI-89. Why and is there a way to make it work on the platinum? I am aware that this does