题目内容
(选做题)求下列函数的导数:
(1)y=(2x3-x+
)4;
(2)y=
;
(3)y=sin2(2x+
);
(4)y=
.
(1)y=(2x3-x+
| 1 |
| x |
(2)y=
| 1 | ||
|
(3)y=sin2(2x+
| π |
| 3 |
(4)y=
| 1+x2 |
(1)y′=4(2x3-x+
)3(6x2-1-
)
(2)y′= -
=-
=
(3)y′=2sin(2x+
) cos(2x+
)•2 =2sin(4x+
)
(4)y′=
(1+x2)-
•2x=
| 1 |
| x |
| 1 |
| x2 |
(2)y′= -
(
| ||
| 1-2x2 |
| ||||||
| 1-2x2 |
2x
| ||
| (1-2x2)2 |
(3)y′=2sin(2x+
| π |
| 3 |
| π |
| 3 |
| 2π |
| 3 |
(4)y′=
| 1 |
| 2 |
| 1 |
| 2 |
| x | ||
|
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