题目内容
解析:y′=4x3,k=4×23=32,y-16=32(x-2),即32x-y-48=0.
答案:32x-y-48=0
A.32x-y+48=0 B.x-32y-48=0 C.32x+y-48=0 D.32x-y-48=0