Whakaoti mō P
\left\{\begin{matrix}P=\frac{U}{R}\text{, }&U\neq 0\text{ and }R\neq 0\\P\neq 0\text{, }&R=0\text{ and }U=0\end{matrix}\right.
Whakaoti mō R
R=\frac{U}{P}
P\neq 0
Tohaina
Kua tāruatia ki te papatopenga
RP=U
Tē taea kia ōrite te tāupe P ki 0 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te P.
\frac{RP}{R}=\frac{U}{R}
Whakawehea ngā taha e rua ki te R.
P=\frac{U}{R}
Mā te whakawehe ki te R ka wetekia te whakareanga ki te R.
P=\frac{U}{R}\text{, }P\neq 0
Tē taea kia ōrite te tāupe P ki 0.
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