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The slope of tangent at any point (x, y) on a curve y = y(x) is xy 2 y x 2 2  , x > 0. If y

1. = 0, then a value of y(8) is
2. 2 4 
3. 3 2
4. 3 2  (4) 3 4

Correct answer: 3 2  (4) 3 4

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