[知识]导数运算公式和运算
法则
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导数定义章节练习学案
一、常见基本初等函数的导数公式和常用导数运算公式
'''1,,'nsinx,1、________,________,________C,x,,,,________,,,,x,,
'''''xxcosx,lnx,logx,__________________________________________e,a,,,,,,,,,,,a
2、导数运算法则
''(1)____________________(2)____________________,fxgx,,fxgx ,,,,,,,,,,,,,,,,,
',,fx',,(3) ___________________________(4) ______________________cfx,,,,,,,,,,gx,,,,
',,1___________________________ (5) ,,,fx,,,,
二、求函数的导数
1、例
题
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板演 利用导数公式及运算公式(加、减、乘)求简单函数的导数
''''22(1)解: yxxxx,,,,,,,,2422022yxx,,,24,,,,,,
2fxxx,,,11(2)
方法
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一,解:因为f(x),(x,1)(x,1),x,1,,,,,,
22,,,, 所以f(x),(x,1),(x),1,2x,0,2x
'''fxxxxxxxx,,,,,,,,,,,1111112方法二,解,,,,,,,,,,,,,,
''xxxxxx,,,,,,,,,11111111 ,,,,,,,,,,,,x,12'fx,fx,,,(3)解:,,,,222x,1xxx,,,111,,,,,,
22'fxx,,2fxxx,,,44fxx,,24(4),解:化简得,所以,,,,,,,,
2、自主练习求下列各函数的导数
2,123(1)_____________________________ (2) ___________________________ yx,,yx,
33(3) ____________________ (4)________ fxxx,,,31yxx,,,21,,
13232(5)___________________ (6)___________ fxxx,,,1fxxx,,,267,,,,3
3232(7)_________________________(8)___________ fxxx,,,435fxaxxx,,,,7,,,,
32(9) fxxxaxb,,,,,3,,
32(10) ____ fxaxbxxc,,,,2,,
mmm—a1,mnm,nmnmnnna,,,,a,a,a 提示:,aa,anmnaa
11(11) _____________________________________________________________y,,3325xx
33375fxxxxx,,,,5(12)_______________________________________________ ,,7
1xy,(13) __________________________(14)________________________ye,2x
3nx(15)_______________________________(16)__________________yxx,,logyxe,2
(17)___________________________________________________________yxx,,3cos4sin
22(18)______________________________________________________y,(3x,1)(4x,3)
11,,23(19) _________________________________________________fxxxx,,,21,,,,,,23,,
22(20) ____________________________________________________fxxx,,,232,,,,,,
(21)__________________________ (22)____________________fxxx,lny,xcosx,,
x(23)____________________________________________ y,elnx
x2(24) ______________________________________________ ,,y,ex,1
3(25)_________________________________________________y,xlnx,x
导数运算法则:除法
92xy,(1)_____________________________________ (2)y,____________________2x1,x
cosxx,1y,y, (3)_____________________________ _____(4)___________________2x,1x
2x,1,xy,(5)y,________________________________(6)____________________lnx2x
cosxcosxy,y,(7)________________________________(8)____________________lnxsinx
xx,cosy,(9)_________________________________________________________________ xx,sin
4xy,(10)___________________________________________________________________2xa,
2x2x,y,,y,(11)___________________________________ (12)__________________xex
求下列函数的导数
122x,12fxx,,1fxe,fxx,cosfxx,,2 (1) (2) (3)(4),,,,,,,,,,,,2
三、同步练习
'31、 函数,则 ( )f3,f(x),x,2x,1,,
A(22 B(23 C(24 D(25 2、fxx,2的导数是 ( ),,
A(2x B(x C(2 D(-2
32fxx,3(的导数是 ( ),,
11222,x3x B( C( D( A(3233x
2st,,124、一质点运动方程为,则在t=1时刻的瞬时速度是 ( )
A(-4 B(-6 C(-1 D(4
25、在曲线图像上一点A(1,2),则过A点的切线的斜率为 ( )yx,,1
A(2x B(1 C(2 D(5
1yx,,6、函数,在点x=1处的导数是 ( )x
A(1 B(-1 C(0 D(-2
27、任一做直线运动的物体,其位移与时间的关系是则物体的加速度是 ( )stt,,3,
A(0 B(3 C(-2 D(3-2t
3'fxx,,fx,3x8、若,则的值是 ( ),,,,00
A(1 B(-1 C( D(2 ,1
12,,29、已知曲线上一点,则过点P的切线的斜率和倾斜角分别为 ( )yx,,2P1,,,,23,,
3330:45:135:A( , B(1, C(-1, D(,150?-33
210、已知曲线上一点,则点A处的切线斜率是 ( )A2,8yx,2,,
A(4 B(16 C(8 D(2 11、下列函数中,在x=0处的导数不等于0的是 ( )
2x2xA( B( C( D(yxx,,1yxe, yx,,1yxe,,,,,
12、函数yxaxb,,,在x=a处的导数为 ( ),,,,
abab,,,aabA( B( C(0 D(,,
3fxx,13、已知的切线的斜率等于1,则切线有 ( ),,
A(1条 B(2条 C(3条 D(4条
12y,14(1)求曲线在点(1,1)处的切线方程(2)求曲线在点(2,4)的切线方程yx,x
byfx,2,2ffxax,,15、设,曲线在处的切线方程为74120xy,,,,求,,,,,,,,x
Ayfx,k,,Ax,By,C,0的解析式。(提示:直线的斜率) ,,B
216、思考:(待定系数法)已知抛物线通过点(1,1),且在点(2,-1)处与yaxbxc,,,直线相切,求 a,b,c的值yx,,3