A:y=﹣4x
B:y=﹣2x
C:y=4x
D:y=2x
①蚯蚓——体壁 ②蛇——肺 ③鲫鱼——鳃④家鸽——肺和气囊
已知函数f(x)的导数为f'(x),且满足关系式f(x)=x2+3xf'(2)+lnx则f'(2)的值等于( )
- Your head teacher has set up a Wechat group. Could you tell _______?
- It is more convenient to communicate with our parents.