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Question

P={x:6<3x9<12,xR}Q={x:13+4x35,xZ}
The elements of PQ = .

A
{-1, 0,1,2,3,4,5,6}
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B
{-1,0,1,2,3}
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C
{6}
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D
{5}
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Solution

The correct option is C {6}
For P
3x -9 > 6
3x > 9+6
3x > 15
x>153
x > 5 , x R ............(1)
3x -9 < 12
3x < 21
x < 7, x in Z ..............(2)
Hence, PQ = {6}.

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