求导公式(撇号为转置):

Y = A * X –> DY/DX = A’ Y = X * A –> DY/DX = A Y = A’ * X * B –> DY/DX = A * B’ Y = A’ * X’ * B –> DY/DX = B * A’

乘积的导数

d(f*g)/dx=(df’/dx)g+(dg/dx)f’