A relatively direct method is expounded in this paper to prove the termwise differentiation of power series, and a simple method is expressed to calculate the Fourier coefficient.
用比较直接的方法证明幂级
的和函
敛域内可以逐项微
的公式；并得到了计算
立叶系的一种简便方法.
词条纠错
X
adv.,adj. 逐项地(的)
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