3.求下列曲面在所示点处的切平面与法线:-|||-(1) -(e)^2x=0, 在点(1,1,2);-|||-(2) dfrac ({x)^2}({a)^2}+dfrac ({y)^2}({b)^2}+dfrac ({z)^2}({c)^2}=1 在点 (dfrac (a)(sqrt {3)},dfrac (b)(sqrt {3)},dfrac (c)(sqrt {3)})()

求曲面z=x^2+y^2在点(1,1,2)处的切平面方程.求曲面$$z=$$$$x^2$$+$$y^2$$在点(1,1,2)处的切平面方程.

2.求下列曲面在给定点的切平面方程和法线方程:-|||-(1) =(x)^2+(y)^2, 点M0(1,2,5);-|||-(2) =arctan dfrac

[题目]求椭圆 dfrac ({x)^2}(4)+dfrac ({y)^2}(9)=1 在点 (1,dfrac (3sqrt {3)}(2)) 处的法线方-||

2.求曲面 =(x)^2+(y)^2-1 在点(2,1,4)处的切平面方程与法线方程.

i 1设曲面 :dfrac ({x)^2}(2)+(y)^2+dfrac ({z)^2}(4)=1 及平面 pi :2x+2y+z+5=0.-|||-(1)求曲

求曲线=dfrac (3{x)^2-2x+1}({x)^2+2}在点=dfrac (3{x)^2-2x+1}({x)^2+2}处的切线方程和法线方程.求曲线在点

[问答题]求y2=2x在点（1/2，1）处的法线与y2=2x所围图形面积。

曲面=dfrac ({x)^2}(2)+(y)^2上与 平面=dfrac ({x)^2}(2)+(y)^2平行的切平面为（ ）=dfrac ({x)^2}

3.求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x

3.求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x) =-|||-(2) =xsin 2x ;-|||-(3) =dfrac