Whakaoti mō I (complex solution)
\left\{\begin{matrix}I=-\frac{2000\left(9r^{2}+18r-2\right)}{\left(R\left(r+1\right)\right)^{2}}\text{, }&r\neq -1\text{ and }R\neq 0\\I\in \mathrm{C}\text{, }&\left(r=-\frac{\sqrt{11}}{3}-1\text{ or }r=\frac{\sqrt{11}}{3}-1\right)\text{ and }R=0\end{matrix}\right.
Whakaoti mō I
\left\{\begin{matrix}I=-\frac{2000\left(9r^{2}+18r-2\right)}{\left(R\left(r+1\right)\right)^{2}}\text{, }&r\neq -1\text{ and }R\neq 0\\I\in \mathrm{R}\text{, }&\left(r=-\frac{\sqrt{11}}{3}-1\text{ or }r=\frac{\sqrt{11}}{3}-1\right)\text{ and }R=0\end{matrix}\right.
Whakaoti mō R (complex solution)
\left\{\begin{matrix}R=-\frac{20iI^{-\frac{1}{2}}\sqrt{45r^{2}+90r-10}}{r+1}\text{; }R=\frac{20iI^{-\frac{1}{2}}\sqrt{45r^{2}+90r-10}}{r+1}\text{, }&r\neq -1\text{ and }I\neq 0\\R\in \mathrm{C}\text{, }&\left(r=-\frac{\sqrt{11}}{3}-1\text{ or }r=\frac{\sqrt{11}}{3}-1\right)\text{ and }I=0\end{matrix}\right.
Whakaoti mō R
\left\{\begin{matrix}R=\frac{20\sqrt{-\frac{5\left(9r^{2}+18r-2\right)}{I}}}{|r+1|}\text{; }R=-\frac{20\sqrt{-\frac{5\left(9r^{2}+18r-2\right)}{I}}}{|r+1|}\text{, }&\left(I<0\text{ or }r\leq \frac{\sqrt{11}}{3}-1\right)\text{ and }\left(I<0\text{ or }r\geq -\frac{\sqrt{11}}{3}-1\right)\text{ and }r\neq -1\text{ and }\left(I>0\text{ or }r\geq \frac{\sqrt{11}}{3}-1\text{ or }r\leq -\frac{\sqrt{11}}{3}-1\right)\text{ and }I\neq 0\\R\in \mathrm{R}\text{, }&\left(r=-\frac{\sqrt{11}}{3}-1\text{ or }r=\frac{\sqrt{11}}{3}-1\right)\text{ and }I=0\end{matrix}\right.
Tohaina
Kua tāruatia ki te papatopenga
IRR\left(r+1\right)^{2}=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakareatia ngā taha e rua o te whārite ki te \left(r+1\right)^{2}.
IR^{2}\left(r+1\right)^{2}=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakareatia te R ki te R, ka R^{2}.
IR^{2}\left(r^{2}+2r+1\right)=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(r+1\right)^{2}.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakamahia te āhuatanga tohatoha hei whakarea te IR^{2} ki te r^{2}+2r+1.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=22000+\left(r^{2}+2r+1\right)\left(-18000\right)
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(r+1\right)^{2}.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=22000-18000r^{2}-36000r-18000
Whakamahia te āhuatanga tohatoha hei whakarea te r^{2}+2r+1 ki te -18000.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=4000-18000r^{2}-36000r
Tangohia te 18000 i te 22000, ka 4000.
\left(R^{2}r^{2}+2R^{2}r+R^{2}\right)I=4000-18000r^{2}-36000r
Pahekotia ngā kīanga tau katoa e whai ana i te I.
\left(R^{2}r^{2}+2rR^{2}+R^{2}\right)I=4000-36000r-18000r^{2}
He hanga arowhānui tō te whārite.
\frac{\left(R^{2}r^{2}+2rR^{2}+R^{2}\right)I}{R^{2}r^{2}+2rR^{2}+R^{2}}=\frac{4000-36000r-18000r^{2}}{R^{2}r^{2}+2rR^{2}+R^{2}}
Whakawehea ngā taha e rua ki te R^{2}r^{2}+2rR^{2}+R^{2}.
I=\frac{4000-36000r-18000r^{2}}{R^{2}r^{2}+2rR^{2}+R^{2}}
Mā te whakawehe ki te R^{2}r^{2}+2rR^{2}+R^{2} ka wetekia te whakareanga ki te R^{2}r^{2}+2rR^{2}+R^{2}.
I=\frac{2000\left(2-18r-9r^{2}\right)}{R^{2}\left(r+1\right)^{2}}
Whakawehe 4000-36000r-18000r^{2} ki te R^{2}r^{2}+2rR^{2}+R^{2}.
IRR\left(r+1\right)^{2}=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakareatia ngā taha e rua o te whārite ki te \left(r+1\right)^{2}.
IR^{2}\left(r+1\right)^{2}=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakareatia te R ki te R, ka R^{2}.
IR^{2}\left(r^{2}+2r+1\right)=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(r+1\right)^{2}.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=22000+\left(r+1\right)^{2}\left(-18000\right)
Whakamahia te āhuatanga tohatoha hei whakarea te IR^{2} ki te r^{2}+2r+1.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=22000+\left(r^{2}+2r+1\right)\left(-18000\right)
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(r+1\right)^{2}.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=22000-18000r^{2}-36000r-18000
Whakamahia te āhuatanga tohatoha hei whakarea te r^{2}+2r+1 ki te -18000.
IR^{2}r^{2}+2IR^{2}r+IR^{2}=4000-18000r^{2}-36000r
Tangohia te 18000 i te 22000, ka 4000.
\left(R^{2}r^{2}+2R^{2}r+R^{2}\right)I=4000-18000r^{2}-36000r
Pahekotia ngā kīanga tau katoa e whai ana i te I.
\left(R^{2}r^{2}+2rR^{2}+R^{2}\right)I=4000-36000r-18000r^{2}
He hanga arowhānui tō te whārite.
\frac{\left(R^{2}r^{2}+2rR^{2}+R^{2}\right)I}{R^{2}r^{2}+2rR^{2}+R^{2}}=\frac{4000-36000r-18000r^{2}}{R^{2}r^{2}+2rR^{2}+R^{2}}
Whakawehea ngā taha e rua ki te R^{2}r^{2}+2rR^{2}+R^{2}.
I=\frac{4000-36000r-18000r^{2}}{R^{2}r^{2}+2rR^{2}+R^{2}}
Mā te whakawehe ki te R^{2}r^{2}+2rR^{2}+R^{2} ka wetekia te whakareanga ki te R^{2}r^{2}+2rR^{2}+R^{2}.
I=\frac{2000\left(2-18r-9r^{2}\right)}{\left(R\left(r+1\right)\right)^{2}}
Whakawehe 4000-18000r^{2}-36000r ki te R^{2}r^{2}+2rR^{2}+R^{2}.
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