Question

Caauuu 7 ạ giúp mik với thứ 2 e thi

Answer 1

Bài 7:

Ta có: \(\dfrac{R_1}{R_2}=\dfrac{l_1}{l_2}=\dfrac{2l_2}{l_2}=2\rightarrow R_1=2R_2\)

Lại có: \(\dfrac{R_1}{R_2}=\dfrac{S_2}{S_1}=\dfrac{S_2}{3S_2}=\dfrac{1}{3}\rightarrow3R_1=R_2\)

\(\Rightarrow1,5R_1=R_2\)