g(x) = (3x - 1) / (4x^2 + 3) 求导
问题描述：
g(x) = (3x - 1) / (4x^2 + 3) 求导
答
g'(x)=[3(4x²+3）-8x（3x-1)]/(4x²+3）²
=(-12x²+8x+9))/(4x²+3）²