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I1 · 2014-02-12 · 2 2 . 2 2 2 2 2 2 sin 1 0 2 cos x k x k x k k x x x Vậy nghiệm của phương trình là 2 , . 2 x k2 , x k k 0,5 Điều kiện: . 2 1 2y 1 0 y Phương
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