1. find the equation of the tangent at the specific point for each of the following
a)y=3^x (1,3) b)y=log(下面小2)(x+2), (-1,0)
2.d^2y/dx^2 的 cos^-1/x 是什麼@@?
更新1:
(d^2y)/(dx^2) 的 (cos^-1)x/x 謝謝你囉:D
