在数列{Xn}中.2/Xn=1/(Xn-1) + 1/(Xn+1),(n≥2),在数列{Xn}中.2/Xn= 1/(Xn-1) + 1/(Xn+1),(n≥2),且X2=2/3,X4=2/5,则X10=()A.2/11 B.1/6 C.1/12 D.1/5
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![在数列{Xn}中.2/Xn=1/(Xn-1) + 1/(Xn+1),(n≥2),在数列{Xn}中.2/Xn= 1/(Xn-1) + 1/(Xn+1),(n≥2),且X2=2/3,X4=2/5,则X10=()A.2/11 B.1/6 C.1/12 D.1/5](/uploads/image/z/4027514-50-4.jpg?t=%E5%9C%A8%E6%95%B0%E5%88%97%7BXn%7D%E4%B8%AD.2%2FXn%3D1%2F%28Xn-1%29+%2B+1%2F%28Xn%2B1%29%2C%28n%E2%89%A52%29%2C%E5%9C%A8%E6%95%B0%E5%88%97%7BXn%7D%E4%B8%AD.2%2FXn%3D+1%2F%28Xn-1%29+%2B+1%2F%28Xn%2B1%29%2C%28n%E2%89%A52%29%2C%E4%B8%94X2%3D2%2F3%2CX4%3D2%2F5%2C%E5%88%99X10%3D%28%29A.2%2F11+B.1%2F6+C.1%2F12+D.1%2F5)
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