2+2的2次方+2的3次方…+2的99次方+2的100次方
是一个等比数列
首项是2,公比是2 项数是100
2+2的2次方+2的3次方…+2的99次方+2的100次方
=2(1-2^100)/(1-2)
=2(2^100-1)
=2^101-2
注:2^100表示2的100次方
2+2的2次方+2的3次方…+2的99次方+2的100次方=?
2+2的2次方+2的3次方…+2的99次方+2的100次方=?
数学人气:135 ℃时间:2019-11-02 12:48:31
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