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Is the given data correct? If yes then what is the answer to this query?

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first expression will return {X2}

 

so answer can be 1 if  second expression does not contain {x2}

or  0 if second expression contain {X2}

 

There  are third row in Q where Q.T>2 and it also contains X2. so  it will be joined with the first row of R.so second expression contains X2

 

Answer will be zero

 

 

 

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