1.

x"@"y=xy-1, if x gty =0," otherwise" and x#y=(x+y)/(x-y) if x ge0, y ge 0 =1," otherwise." The value of ((4#2)"@"(9#(-1)))/((2"@"3)#(5"@"2)):

Answer»

1
-2
0
none of these

Answer :B


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