导数及其应用作为高中数学与高等数学的衔接点,近几年来问题考查的深度与广度在不断加大,以下就高考中导数的应用分类例析.题型1运用导数几何意义解题例1设曲线y=xx-+11在点(3,2)处的切线与直线ax+y+1=0垂直,则a=.y′=-(x-21)2,所以y=xx-+11在(3,2)处的切线率k1=-21.因为直线ax Derivatives and their Applications As the convergence point of high school mathematics and advanced mathematics, in recent years, the depth and breadth of problem examinations are constantly increasing, the following classification and analysis of the application of the derivative in the college entrance examination. Let the curve y = xx - + 11 be perpendicular to the straight line ax + y + 1 = 0 at the point (3,2), then a = .y ’= - (x- 21) 2, so y = xx- + 11 Tangent rate at (3,2) k1 = -21. Because of the straight line ax