作点A(-8,3)关于x轴的对称点A′(-8,-3),作点B(-4,5)关于y轴的对称点B′(4,5),设直线A′B′的方程为y=kx+b(k≠0),则
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故过A′B′的直线解析式为:y=
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直线A′B′与x轴交点D(m,0),与y轴交点为C(0,n),
可得m=-
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故答案为:-
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作点A(-8,3)关于x轴的对称点A′(-8,-3),作点B(-4,5)关于y轴的对称点B′(4,5),设直线A′B′的方程为y=kx+b(k≠0),
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