Question

. If A = {x:x e N and (x2 – 4) (x² – 3)=0} and B = {x:Xe N and x (x - 1) (x - 2)=0} then B x A is
(A) {(1,2), (2, 2)}
(B) {(1, 2), (2, 2), (1, -2), (2, -2)}
(C){(1, 2), (2, 2), (1, 73), (2,3)}
(D) {(0,2), (0, -2), (0, 13), (0,-3)}​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Physical changes in burning candle On heating, candle's wax melts, it is a physical change. Since, it again turns into solid wax on cooling. The change is reversible. Chemical changes in burning candle The wax near to flame burns and gives new substances like carbon dioxide, carbon soot, water vapours, heat and light.