设已知数列{an}满足a1=1,an-2an-1-2的n-1次方=0(n∈N*,n≥2).求证:数列{2的n次方分之an}是等差数列.若数列{an}的前n项和为sn,求sn.

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设已知数列{an}满足a1=1,an-2an-1-2的n-1次方=0(n∈N*,n≥2).求证:数列{2的n次方分之an}是等差数列.若数列{an}的前n项和为sn,求sn.设已知数列{an}满足a1

设已知数列{an}满足a1=1,an-2an-1-2的n-1次方=0(n∈N*,n≥2).求证:数列{2的n次方分之an}是等差数列.若数列{an}的前n项和为sn,求sn.
设已知数列{an}满足a1=1,an-2an-1-2的n-1次方=0(n∈N*,n≥2).求证:数列{2的n次方分之an}是等差数列.若数列{an}的前n项和为sn,求sn.

设已知数列{an}满足a1=1,an-2an-1-2的n-1次方=0(n∈N*,n≥2).求证:数列{2的n次方分之an}是等差数列.若数列{an}的前n项和为sn,求sn.