Find the equivalent resistance between points A and B.

Explanation

`(1)/(R ) = (1)/(R_1) +(1)/(R_2) + (1)/(R_3) = (1)/(12) + 1/6 + 1/4 + 6/(12) = 1/2`
` R = 2 Omega`
` R.= 2 Omega `
`R. = 2 + 5= 9 Omega `