How can we find the equivalent resistance of a circuit if there are "two resistors " in parallel?

How can we find the equivalent resistance of a circuit if there are "t

1.	How can we find the equivalent resistance of a circuit if there are "two resistors " in parallel?
Answer» Total resistance =1/R1+1/R2 and soon. 1/req=1/r(resistor1)+1/r(resistor2)