导数运算公式和运算法则
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,
33fxxx,,,31(3) ____________________ (4)________ yxx,,,21,,
13232fxxx,,,1fxxx,,,267(5)___________________ (6)___________ ,,,,3
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3232(7)_________________________(8)___________ fxxx,,,435fxaxxx,,,,7,,,,
32(9) fxxxaxb,,,,,3,,
32(10) ____ fxaxbxxc,,,,2,,
mmm—a1,mnm,nmnmnnn提示:,,, a,a,a,a,aa,annmaa
11(11) _____________________________________________________________ y,,3325xx
33735(12)_______________________________________________ fxxxxx,,,,5,,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,,
22fxxx,,,232(20) ____________________________________________________ ,,,,,,
fxxx,lny,xcosx(21)__________________________ (22)____________________ ,,
x(23)____________________________________________ y,elnx
x2(24) ______________________________________________ ,,y,ex,1
3(25)_________________________________________________ y,xlnx,x
导数运算法则:除法
92xy,y,(1)_____________________________________ (2)____________________ 2x1,x
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cosxx,1 (3)_____________________________ _____(4)___________________ y,y,2x,1x
2x,1,x(5)________________________________(6)____________________ y,y,lnx2x
cosxcosx(7)________________________________(8)____________________ y,y,lnxsinx
xx,cos(9)_________________________________________________________________ y,xx,sin
4x(10)___________________________________________________________________ y,2xa,
2x2,x(y,,11)___________________________________ (12)y__________________ ,xex求下列函数的导数
122x,12fxx,,1 (1) (2)fxe, (3)fxx,cos(4) fxx,,2,,,,,,,,,,,,2
三、同步练习
'3f3,1、 函数,则 ( ) f(x),x,2x,1,,
A(22 B(23 C(24 D(25
fxx,22、的导数是 ( ) ,,
A(2x B(x C(2 D(-2
32fxx,3(的导数是 ( ) ,,
11222,3xxA( B( C( D( 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
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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
16、函数,在点x=1处的导数是 ( ) yx,,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
3'8、若,则的值是 ( ) fxx,,fx,3x,,,,00
A(1 B(-1 C( D(2 ,1
12,,29、已知曲线yx,,2上一点,则过点P的切线的斜率和倾斜角分别为 ( ) P1,,,,23,,
3330:45:135:A( , B(1, C(-1, D(,150? -33
2A2,810、已知曲线上一点,则点A处的切线斜率是 ( ) yx,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 ( )
2x2xyxx,,1A( B( C( D( yxe, yx,,1yxe,,,,,
yxaxb,,,12、函数在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
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b15、设,曲线在处的切线方程为,求yfx,2,2ffxax,,74120xy,,,,,,,,,,,x
A的解析式。(提示:直线的斜率) yfx,k,,Ax,By,C,0,,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
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