Tips for Beginners for the TI 89 Calculator

The domains of some functions are restricted, because they produce complex results for some x. For example y y = x2/3 is considered to be defined only for x ( 0 and y = is considered to be defined only for x ≥ 4. The TI-89 can be commanded to show just these parts by changing the complex format mode, but the required setting is a bit ... ................
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