Question: Let 0M'MM 0 be a short exact sequence R-modules and let NCM be an R-submodule. Show that B 0 a(N) N B(N) 0 is

Let 0M'MM" 0 be a short exact sequence R-modules and let NCM 

Let 0M'MM" 0 be a short exact sequence R-modules and let NCM be an R-submodule. Show that B 0 a(N) N B(N) 0 is a short exact sequence of R-modules.

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