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ڵλãҳ > 一元二次不等式的解法

һԪβʽĽⷨ(̰)һָϰ һ ѧĿ ֪ʶĿ꡿ (1) ѧһԪβʽԴʵ,˽һԪβ ʽйظ...
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+bx+c ͼ.ѧ˵ ʽ ax2+bx+c<0 Ľͷ ax2+bx+c=0 Ľ,ͬʱעһԪη̡һԪ βʽͶκʲôϵ...
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һԪβʽ_ѧ_ѧ_н_רһԪβʽ(֪ʶ)αҪ:ʵ龳гһԪβʽģ...
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һԪηһԪβʽĽⷨ_һѧ_ѧ_н_רһԪη̡κһԪβʽܽ⡾֪ʶعˡ 1...
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һԪβʽ͸_ѧ_н_רһԪβʽ͸һ:һԪβʽ 1. һԪβ...
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2 2 2 2 2 2 2 2 صѵ صѵСصһԪβʽĽⷨ,ѵһԪη̡һԪβʽκ ϵһԪ...
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ѵ: ѵ:κ һԪηһԪβʽ⼯Ĺϵ, һԪβʽ ͼ ֪ʶҪ ֪ʶһ: ֪ʶһ:һԪβ...
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һԪβʽĽⷨϼ_ѧ_Ȼѧ_רҵϡ2015 ѧѧҵ 1 һһԪβʽĽⷨ һԪβʽĽⷨ...
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һԪηһԪβʽĽⷨ_߶ѧ_ѧ_н_רʽĽⷨһԪη̡κһԪβʽ һԪη̡κ...
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ѧ ˽ A ѧ 5 һԪβʽ (һʱ) λ:еڶ߼ѧ : ʱ:2014 4 3.2 һԪβ...
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