" 4.If "x=-y" and "y>0," which of the following is wrong? "

If x = - y and y gt 0 , which of the following is wrong ?

If x=10 and y=0.1, which of the following is the greatest? x^(2)+y^(2)( b) x^(2)-y^(2)( c) x^(2)backslash y^(2) (d) (x^(2))/(y^(2))

For all nonzero numbers x and y, the operation grad is defined by the equation x grad y = (|x|)/(x^(2))+(y^(2))/(|y|) when x gt y and by the equation x grad y = (|x|)/(y^(2))-(x^(2))/(|y|) when x le y . If x grad y lt 0 , then which of the following could be true ? I. x^(3)=y^(3) II. (y+x)(y-x)gt 0 III. x-y gt 0

If A={:[(0,y),(y,0)]:} which of the following is true ?

If |(y,x,0),(0,y,x),(x,0,y)|=0 and x ne 0 , then which one of the following is correct ?

The values of x and y which make the following solutions true are: cos x^(0)=sin40^(@) and cos y^(0)=sin(y^(0)+10)

For the circle x ^(2) + y^(2) + 6x -8y +9=0, which of the following statement is true ?

For the circle x ^(2) + y^(2) + 6x -8y +9=0, which of the following statement is true ?