34 For Rt = O Rt= R1 ORt= 1 + 1 O Rt Hints: Make the denominator in the expression on the right side of the sign a single fraction by adding the fractions using a common denominator. Then, use "invert and multiply" to simplify a fraction that has a fraction in its denominator. V 1 R - R+R 2 O Rt R + R R+R R R = R R R+R