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已知 (f \circ g)(x) = 4x^2 - 4x + 5 和 g(x) = 2x - 1 ,求。(提示:令。)
已知 (f \circ g)(x) = 4x^2 - 4x + 5 和 g(x) = 2x - 1 ,求。(提示:令。)
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