Follow the Rules for Working with Measurements $\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } }$

Short Answer

Follow the rules for working with measurements.
Use the formula $\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } }$ .
Given $R _ { 1 } = 39 \Omega$ and $R _ { 2 } = 30 \Omega$ , find R.
R = __________Ω