设函数y=ln(x-2),则dy/dx=多少
问题描述:
设函数y=ln(x-2),则dy/dx=多少
答
设z=x-2
dy/dx=dz/dx×dz/dy=1×1/y=1/(x-2)
答
dy=d(ln(x-2))
=(1/(x-2))*d(x-2)
=(1/(x-2))dx
所以,dy/dx=1/(x-2)