【急】已知数列an满足1/a1a2+1/a2a3+……1/an-1an=(n-1)/a1an,求证为等差数列已知数列an满足1/(a1a2)+1/(a2a3)+……1/(an-1an)=(n-1)/a1an,求证为等差数列.
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题目内容:
【急】已知数列an满足1/a1a2+1/a2a3+……1/an-1an=(n-1)/a1an,求证为等差数列
已知数列an满足1/(a1a2)+1/(a2a3)+……1/(an-1an)=(n-1)/a1an,求证为等差数列.
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