1.数列{(2n-3)/2^(n-3)}的前n项和为A.4-((2n-1)/2^(n-2))B.4+((2n-7)/2^(n-2))C.8-((2n+1)/2^(n-3))D.6-((3n+2)/2^(n-2))
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![1.数列{(2n-3)/2^(n-3)}的前n项和为A.4-((2n-1)/2^(n-2))B.4+((2n-7)/2^(n-2))C.8-((2n+1)/2^(n-3))D.6-((3n+2)/2^(n-2))](/uploads/image/z/1159263-63-3.jpg?t=1.%E6%95%B0%E5%88%97%7B%EF%BC%882n-3%EF%BC%89%2F2%5E%28n-3%29%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BAA.4-%28%282n-1%29%2F2%5E%28n-2%29%29B.4%2B%28%282n-7%29%2F2%5E%28n-2%29%29C.8-%28%282n%2B1%29%2F2%5E%28n-3%29%29D.6-%28%283n%2B2%29%2F2%5E%28n-2%29%29)
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