解
y‘=[sin(lnx)+cos(lnx)]+x[sin(lnx)+cos(lnx)]'
=[sin(lnx)+cos(lnx)]+x[cos(lnx)/x-sin(lnx)/x]
=[sin(lnx)+cos(lnx)]+[cos(lnx)-sin(lnx)]
=2cos(lnx)这个算不算复合函数求导?算吧求这个的时候就是用复合函数求导的[sin(inx)+cos(Inx)]
猜你喜欢
- 1我爱数学剩以9等于学数爱我.请问我爱数学分别是多少?
- 2在三角形ABC中,角B=2角C,AD是三角形ABC的角平分线.证明:AC=AB+BD
- 3求函数y=1/x在x=a(a≠0)处的导数
- 4meant to have done
- 5how do you think of the house?what do you think of the house?那个句子正确?
- 6据的多音字组词,每个读音两个词,求,
- 7He __(live) in Beijing last year
- 8已知P是△ABC所在平面外一点,PA、PB、PC两两垂直,H是△ABC的垂心,求证:PH⊥平面ABC.
- 94只鸽子飞回3个笼子,至少有( )只鸽子飞进同一个笼子.
- 10过点P(1,2)引直线,使A(2,3)、B(4,-5)到它的距离相等,则此直线方程为( ) A.4x+y-11=0 B.x+4y-6=0 C.4x+y-11=0或3x+2y-7=0 D.4x+y-6=0或3x+2y-7=0