A. A∩B=B∩A B.A∪B=B∪A C.A∪A=A D.B∩B=B
E.A\B=B\A
15.If S={1,2,3,4,5,6,7} is the universal set ,P={1,2,3,4} and Q´={1,2,7}, then P∩Q=…..
A. {1,2,3} B.{3,4} C.{3} D.{4} E.∅
16.If P∪Q={x,y,z,u,v},P∩Q={z,u} ,P\Q={x,v} then Q\P=…….
A.{y,z,u} B. {y} C.{x,u,v} D. ∅ E. None of these
17.Given E={2,4} ,F={4,6,8,x} The value of x such that E\F=∅
6.Which of the following statement is (are) true?
1.If m>0 , then the segment makes an actual angle with the positive direction of X-axis.
2. If m<0 , the line segment makes an obtuse angle with the positive direction of X-axis.
3. If m is either positive or negative, then the line segment is nonvertical
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