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解:(a-1)^(2n-1)+2(1-a)^2n+(a-1)^(2n+1)
=(a-1)^(2n-1)+2(a-1)^2n+(a-1)^(2n+1)
=(a-1)^2n(1/(a-1)+2+(a-1)
=(a-1)^2n[
√1/(a-1)+√(a-1)]²
=(a-1)^2n[a/(a-1)√(a-1)]².
=(a-1)^(2n-1)+2(a-1)^2n+(a-1)^(2n+1)
=(a-1)^2n(1/(a-1)+2+(a-1)
=(a-1)^2n[
√1/(a-1)+√(a-1)]²
=(a-1)^2n[a/(a-1)√(a-1)]².
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