函数f(x)=1/(3-x)展开成x的幂级数为____.
函数f(x)=1/(3-x)展开成x的幂级数为____.
【正确答案】:∑n=0xn/3n+1(-3﹤x﹤3)。解析:1/(3-x)=1/3•1/(1-x/3)=1/3∑n=0(x/3)n=∑n=0xn/3n+1(-1﹤x/3﹤1)
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