这个求导之后应该是:
$$
f'(x)=2x^2+4x+2
$$
常数应该不用管的呀
by UltiMadow @ 2019-11-13 18:40:24
写错了,是:
$$
f'(x)=3x^2+4x+1
$$
by UltiMadow @ 2019-11-13 18:43:22
@[fry2017](/user/65681) 牛逼
by 费娘爱学习 @ 2019-11-13 18:47:09
@[fry2017](/user/65681) 求导不看定义域的吗(大嘘
by 已注销^6Gv$vkg @ 2019-11-13 18:50:30
qyz ak CSP
by MSwalker @ 2019-11-14 07:32:26