問題詳情

19. Let f ( x ) be a function defined by 

 
Let p( x ) = a0 + a1 x + a2x2+ … + anxn+ … be the Maclaurin series of f ( x ).
Which of the following items is the value of a3 ?
(A) –1
(B) 0
(C)


(D)


(E)1



參考答案