r1*r2*r3
---------------------
r1*r2 + r1*r3 + r2*r3
$$\frac{r_{1} r_{2} r_{3}}{r_{1} r_{2} + r_{1} r_{3} + r_{2} r_{3}}$$
r1*r2*r3/(r1*r2 + r1*r3 + r2*r3)
Объединение рациональных выражений
[src]
r1*r2*r3
---------------------
r1*r2 + r1*r3 + r2*r3
$$\frac{r_{1} r_{2} r_{3}}{r_{1} r_{2} + r_{1} r_{3} + r_{2} r_{3}}$$
r1*r2*r3/(r1*r2 + r1*r3 + r2*r3)
Рациональный знаменатель
[src]
1
------------
1 1 1
-- + -- + --
r1 r2 r3
$$\frac{1}{\frac{1}{r_{3}} + \frac{1}{r_{2}} + \frac{1}{r_{1}}}$$
r1*r2*r3
---------------------
r1*r2 + r1*r3 + r2*r3
$$\frac{r_{1} r_{2} r_{3}}{r_{1} r_{2} + r_{1} r_{3} + r_{2} r_{3}}$$
r1*r2*r3/(r1*r2 + r1*r3 + r2*r3)
r1*r2*r3
---------------------
r1*r2 + r1*r3 + r2*r3
$$\frac{r_{1} r_{2} r_{3}}{r_{1} r_{2} + r_{1} r_{3} + r_{2} r_{3}}$$
r1*r2*r3/(r1*r2 + r1*r3 + r2*r3)
1
------------
1 1 1
-- + -- + --
r1 r2 r3
$$\frac{1}{\frac{1}{r_{3}} + \frac{1}{r_{2}} + \frac{1}{r_{1}}}$$
2 2
- r1*r3 - r2*r3
r3 + ---------------------
r1*r2 + r1*r3 + r2*r3
$$r_{3} + \frac{- r_{1} r_{3}^{2} - r_{2} r_{3}^{2}}{r_{1} r_{2} + r_{1} r_{3} + r_{2} r_{3}}$$
r3 + (-r1*r3^2 - r2*r3^2)/(r1*r2 + r1*r3 + r2*r3)
1
------------
1 1 1
-- + -- + --
r1 r2 r3
$$\frac{1}{\frac{1}{r_{3}} + \frac{1}{r_{2}} + \frac{1}{r_{1}}}$$