题目

Jeffrey Bezos, founder, president and chairman of the board of Amazon.com, was born in Albuquerque, New Mexico. His mother's ancestors were early settlers in Texas, and over the generations had acquired a 25，000­acre farm at Cotulla. Jeffrey spent most summers of his youth working with his grandfather on their farm. Jeffrey showed intense and varied scientific interests at an early age. He set up an electric alarm to keep his younger sisters and brothers out of his room and changed his parents' garage into a laboratory for his science projects. After he graduated from Princeton Univ对任意x，有f′（x）=4x3，f（1）=-1，则此函数为（ ）A．f（x）=x4-2B．f（x）=x4+2C．f（x）=x3D．f（x）=-x4