已知
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的圖像在點
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處的切線斜率是
;
試題分析:因為
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,所以
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,
所以
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,故
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,故
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在點
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處的切線斜率是
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.
點評:當函數(shù)的解析式中含有參數(shù)時,我們一般是根據(jù)已知條件,構造方程,解方程求出參數(shù),即得函數(shù)的解析式.
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