`A-B =B-A` if

Let A and B are two matrices then which of the following is always true? (i) A+B=B+A (ii)A+B=B-A (iii)A-B=B-A (iv) AB=BA

If A and B are square matrices of same order, then (i) A+B=B+A (iv) A+B=A-B (iii) A-B=B-A( iv) AB=BA

Which of the following statement is false: A-B=A nn B b.A-B=A-(A nn B) c.A-B=A-B' d.A-B=(A uu B)-B

For all set A and B, (A uu B) - B = A - B .

A-B is equal to a.(A uu B)-(A nn B), b.A nn B^(C), c.A nn B,d.B-A

Solve the following cryptarithms: (i) A B x6\\ B B B

Which one of the following operations on sets is not correa where B' denotes the complement of B? a)(B'-A')U(A'-B')=(AUB)-(AnnB) b)(A-B)U(B-A)=(A'UB')-(A'nnB') c)(B'-A')n(A'-B')=(B-A)nn(A-B) d)(B'-A')n(A'-B')=(B-A')U(A'-B)

If A and B are non-empty sets, A nn B = B and A uu B = B , then A and B are "_____" sets. (equal/equivalent).

Find the sum upto n terms of the series 0.b+0.b b+0.b b b +0.b b b b+"......",AA " b" in N " and "1 le b le 9.