函数f(x)=x2ex2在(-∞,+∞)内展成的x的幂级数是()
函数f(x)=x2ex2在(-∞,+∞)内展成的x的幂级数是()
A、∑n=1(-1)n-1[x2n-1/(2n-1)!]
B、∑n=0xn+2/n!
C、∑n=0x2(n+1)/n!
D、∑n=0x2n/n!.
【正确答案】:C
【题目解析】:ex2=∑n=0x2n/n!,∴f(x)=x2ex2=∑n=0x2n+2/n!
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