Question
If A = {1, 2, 4} and B = {1, 2, 3}, represent following sets graphically:
B × B
B × B

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$\text{a}_1=1=\text{a}_2,\text{a}_\text{n}=\ \text{a}_{\text{n}-1}+\text{a}_{\text{n}-2},\text{n}>2$