# How To Define The Domain Of A Function?

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### #1 calculus

calculus

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Posted 06 September 2009 - 05:17 PM

Hi!

How do you define the domain of a certain function? For example, how would you type in the following function (which also happens to a piecewise-defined function): f(x) = 2x+3, if −4 < x < 3; 2x+4, if x > 3

I do know how to graph a function from x1 to x2 (the syntax is f(x),[x1,x2]), but it's important to get the "grater/smaller than" sings right.

If it matters, I have fx-9750GII.

Edited by calculus, 06 September 2009 - 05:18 PM.

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Posted 06 September 2009 - 07:59 PM

You can try Y1 = (2x+3)(x<3)+(2x+4)(x>3). If you cannot access < and > in Graph mode, register them in a FMEM while being in the RUN mode and recalling them in the Graph mode...

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