※ 引述《bitchdog (PEaCE)》之銘言：
: f(x)=sec^2(3x-1) , then f'(x)
2
f(x) = sec (3x-1)
d
f'(x) = (2)(sec(3x - 1))(----(sec(3x - 1))
dx
d
= (2)(sec(3x - 1))(sec(3x - 1))(tan(3x - 1))(----(3x - 1))
dx
= (2)(sec(3x - 1))(sec(3x - 1))(tan(3x - 1))(3)
2
= (6)(sec (3x - 1))(tan(3x - 1))
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.119.66.25