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The function y = f(x) is the solution of the differential equation dx dy + 1 x xy 2 − = 2 4 x 1 x 2 x − + in (–1, 1) satisfying f(0) = 0. Then ∫ − 2 3 2 3 dx ) x ( f is

2 3 3 − π
4 3 3 − π
4 3 6 − π
2 3 6 − π

Correct answer: 4 3 3 − π

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