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If the function f(x)={(Ax-B ,, x le 1),...

If the function `f(x)={(Ax-B ,, x le 1),(3x ,,1 lt x lt 2),(Bx^2-A ,, x ge 2):}`
is continuous at `x=1` and discontinuous at `x=2`,
find the values of `A and B`.

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