n乘以q的n次方,n趋于无穷大,0

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n乘以q的n次方,n趋于无穷大,0

n乘以q的n次方,n趋于无穷大,0
n乘以q的n次方,n趋于无穷大,0

n乘以q的n次方,n趋于无穷大,0
怎么可能是1...
1/(q^n)是1/n的高阶无穷小
答案是0