Current Electricity Part 2

Let two resistors have resistances R1 and R2, respectively.
As per question, equivalent resistance of series combination is s
⇒ s=R1+R2.....(i)
and equivalent resistance of parallel combination is p
⇒‌‌p=‌

R1R2

R1+R2

....(ii)
According to the question, s=np....(iii)
From Eqs. (i),(ii) and (iii), we get
⇒n=‌

(R1+R2)2

R1R2

For n to be minimum, R1=R2=R