Deduce the formula for combining resistances in parallel action or connect them in parallel action.

Combination of Resistance |Series and Parallel connection

With the help of a diagram derive the formula for the equivalent resistance of three resistances connected n parallels?

Why is resistance less in parallel combination of resistors ?

Which one of the following is resistant action

Two resistance of identical shape but of different resistivity of values 3 and 6 are connected in parallel combination .The effective resistivity of the combination is