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## Main Question or Discussion Point

Can somebody please explain effective neutron multiplication factor, with example? So when k=1, k>1, k<1 , please give me some example.

[tex]k=\frac{N_2}{N_1}=\frac{N_3}{N_2}=........=\frac{N_i}{N_i_-_1}[/tex]

[tex]k=\frac{N_2}{N_1}=\frac{N_3}{N_2}=........=\frac{N_i}{N_i_-_1}[/tex]