## Một số công thức đạo hàm cơ bản

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```MÙt sÑ công théc ¡o hàm c¡ b£n:
(vÛi a, INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/7b7f9dbfea05c83784f8b85149852f08.gif" \* MERGEFORMATINET     là h±ng sÑ b¥t kó; u,v là hàm sÑ b¥t kó,x là bi¿n sÑ)
*(a)'=0
*(u.v)'=u'v+v'u
* INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/7f3e92261f09ff5f6e58d2f17334e0c6.gif" \* MERGEFORMATINET
*  INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/91a932cd27347b418ec8ebefa8dbaa43.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/5a802f8e467d5e538a6e947b0f6f37a3.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/c2ecec6e896ef351ea81662c48d282e8.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/5a7cbc2d90d0b230a50ab59ccaef13d4.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/53f2d3cd0f89ced3de7e0c4dc3b500cb.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/0c959605060605c0ef7648e04b17e3ef.gif" \* MERGEFORMATINET
* INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/64a64ca5bb2de41048b982bb120cbd73.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/6f1562e8f6b1cb26371b832bee6452f2.gif" \* MERGEFORMATINET
* INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/49abcdbf32212b2e917202a2e76fc988.gif" \* MERGEFORMATINET
INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/46ebc8cc927fda9fee74a324c9618a84.gif" \* MERGEFORMATINET
*(lnx)'= INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/afc48b56873694f3d43097841ecc3f4f.gif" \* MERGEFORMATINET
(lnu)'= INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/55ae1252341aeb3e1a8ab02588f0c571.gif" \* MERGEFORMATINET
* INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/a2be74b34ecbb0e61e1d2f62aa6cc378.gif" \* MERGEFORMATINET     (a>0,a INCLUDEPICTURE "http://forum.hocmai.vn/mimetex/pictures/bd0d5f08997b7a4ad8598963f7e50231.gif" \* MERGEFORMATINET    1)