1.(-3)^2n*(1/3)^2n-1-2*(-1)^2n-1 2.(1-1/2^2)(1-1/3^2)...(1-1/2004^2)(1-1/2005^2) 3.如果测量一根竹竿长约是1.56米,那么它的实际长度范围是多少?设实际长度为X 1.555
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![1.(-3)^2n*(1/3)^2n-1-2*(-1)^2n-1 2.(1-1/2^2)(1-1/3^2)...(1-1/2004^2)(1-1/2005^2) 3.如果测量一根竹竿长约是1.56米,那么它的实际长度范围是多少?设实际长度为X 1.555](/uploads/image/z/1631258-26-8.jpg?t=1.%EF%BC%88-3%29%5E2n%2A%281%2F3%29%5E2n-1-2%2A%28-1%29%5E2n-1+2.%281-1%2F2%5E2%29%281-1%2F3%5E2%29...%281-1%2F2004%5E2%29%281-1%2F2005%5E2%29+3.%E5%A6%82%E6%9E%9C%E6%B5%8B%E9%87%8F%E4%B8%80%E6%A0%B9%E7%AB%B9%E7%AB%BF%E9%95%BF%E7%BA%A6%E6%98%AF1.56%E7%B1%B3%2C%E9%82%A3%E4%B9%88%E5%AE%83%E7%9A%84%E5%AE%9E%E9%99%85%E9%95%BF%E5%BA%A6%E8%8C%83%E5%9B%B4%E6%98%AF%E5%A4%9A%E5%B0%91%3F%E8%AE%BE%E5%AE%9E%E9%99%85%E9%95%BF%E5%BA%A6%E4%B8%BAX+1.555)
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