有理数乘法{【1/(1*2)】+【1/(2*3)】+...+【1/(9*10)】}的3次方=( )
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![有理数乘法{【1/(1*2)】+【1/(2*3)】+...+【1/(9*10)】}的3次方=( )](/uploads/image/z/252071-71-1.jpg?t=%E6%9C%89%E7%90%86%E6%95%B0%E4%B9%98%E6%B3%95%EF%BD%9B%E3%80%901%2F%EF%BC%881%2A2%EF%BC%89%E3%80%91%2B%E3%80%901%2F%EF%BC%882%2A3%EF%BC%89%E3%80%91%2B...%2B%E3%80%901%2F%EF%BC%889%2A10%EF%BC%89%E3%80%91%EF%BD%9D%E7%9A%843%E6%AC%A1%E6%96%B9%3D%EF%BC%88+%EF%BC%89)
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有理数乘法{【1/(1*2)】+【1/(2*3)】+...+【1/(9*10)】}的3次方=( )
有理数乘法
{【1/(1*2)】+【1/(2*3)】+...+【1/(9*10)】}的3次方=( )
有理数乘法{【1/(1*2)】+【1/(2*3)】+...+【1/(9*10)】}的3次方=( )
{【1/(1*2)】+【1/(2*3)】+...+【1/(9*10)】}的3次方=[1-1/2+1/2-1/3+...+
1/9-1/10]的3次方=(1-1/10)的3次方=(9/10)的3次方=729/1000