1.

If f: N to Z is defined by: f(n) ={{:(2, if, n=3k, k in Z),(10-n, if, n=3k+1, k in Z),(0, if, n=3k, k in Z):}, then {n in N: f(n) gt 2)=

Answer»

{3,6,4}
{1,4,7}
{4,7}
{7}

ANSWER :B


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