tolong jawab pertanyaan nya

[tex][tex] \frac{1}{rp} = \frac{1}{12} + \frac{1}{4} + \frac{1}{6} = \frac{6}{12} \\ rp = \frac{12}{6} = 2 \\ r = 2 + 3 = 5\\ i = \frac{v}{r} = \frac{12}{5} = 2.4[/tex]