1.

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.

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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