Using the reciprocal key on your calculator

By Tutor GuyNo Comments


Your graphing calculator has a reciprocal key on it, designated as x^{-1}. It’s the easiest way to find the reciprocal of a number on your screen. Just press the key, and then Enter.








The reciprocal key is also a great way to do calculations of resistors in parallel or capacitors in series. For example, find the equivalent resistance of a circuit that has a 10 Ω and a 15 Ω resistor in parallel. Simply enter it this way into the calculator to find the answer is 6 Ω.

Algebra 2, Calculator, Physics, Precalc/Trig
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