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Determine whethera** b =ma - nb "on" Q + "where" m "and" n in Noperations as defined by * are binary operations on the sets specified in each case. Give reasons if it is not a binary operation. |
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Answer» Solution :LET a =1, b=2 `m =1, n=3` ` ma -nb =1-6= -5 !in Q^+` `:. A,b in Q^+ IMPLIES a** b in Q^+` ` implies ** "is not a BINARY operation on" Q^+` |
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