求若干数列求和公式 a^0+a^1+a^2+a^3+……+a^n-1+a^n1.a^0+a^1+a^2+a^3+……+a^n-1+a^n2.0^0+1^1+2^2+3^3+……+(n-1)^n-1+n^n3.0^n+1^n+2^n+3^n+……+(a-1)^n+a^n
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![求若干数列求和公式 a^0+a^1+a^2+a^3+……+a^n-1+a^n1.a^0+a^1+a^2+a^3+……+a^n-1+a^n2.0^0+1^1+2^2+3^3+……+(n-1)^n-1+n^n3.0^n+1^n+2^n+3^n+……+(a-1)^n+a^n](/uploads/image/z/6912809-17-9.jpg?t=%E6%B1%82%E8%8B%A5%E5%B9%B2%E6%95%B0%E5%88%97%E6%B1%82%E5%92%8C%E5%85%AC%E5%BC%8F+a%5E0%2Ba%5E1%2Ba%5E2%2Ba%5E3%2B%E2%80%A6%E2%80%A6%2Ba%5En-1%2Ba%5En1.a%5E0%2Ba%5E1%2Ba%5E2%2Ba%5E3%2B%E2%80%A6%E2%80%A6%2Ba%5En-1%2Ba%5En2.0%5E0%2B1%5E1%2B2%5E2%2B3%5E3%2B%E2%80%A6%E2%80%A6%2B%EF%BC%88n-1%EF%BC%89%5En-1%2Bn%5En3.0%5En%2B1%5En%2B2%5En%2B3%5En%2B%E2%80%A6%E2%80%A6%2B%28a-1%29%5En%2Ba%5En)
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