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Answer would be n2x.
1/Re=1/r +1/r +1/r...n/r
1/Re= n/r (in case of parallel)
Re=r/n ----> x=r/n
r=xn
so now in case of series
it would be n2 times of resultant resistance x.
Re= r+r+.....nr
Re=nr (as r=xn)
so,
Re=n*xn
Re=n2x
