关于Mathematica使用的简单问题我要求RSolve[{a[n + 3] == 2/3* a[n] + a[n + 1]/3,a[1] == 2/3,a[2] = 0,a[3] = 2/9},a[n],n]结果RSolve::deqn:Equation or list of equations expected instead of 0 in the first argument {a[1+n]==(2 a[n])/3+1/3 a[1
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![关于Mathematica使用的简单问题我要求RSolve[{a[n + 3] == 2/3* a[n] + a[n + 1]/3,a[1] == 2/3,a[2] = 0,a[3] = 2/9},a[n],n]结果RSolve::deqn:Equation or list of equations expected instead of 0 in the first argument {a[1+n]==(2 a[n])/3+1/3 a[1](/uploads/image/z/12543273-9-3.jpg?t=%E5%85%B3%E4%BA%8EMathematica%E4%BD%BF%E7%94%A8%E7%9A%84%E7%AE%80%E5%8D%95%E9%97%AE%E9%A2%98%E6%88%91%E8%A6%81%E6%B1%82RSolve%5B%7Ba%5Bn+%2B+3%5D+%3D%3D+2%2F3%2A+a%5Bn%5D+%2B+a%5Bn+%2B+1%5D%2F3%2Ca%5B1%5D+%3D%3D+2%2F3%2Ca%5B2%5D+%3D+0%2Ca%5B3%5D+%3D+2%2F9%7D%2Ca%5Bn%5D%2Cn%5D%E7%BB%93%E6%9E%9CRSolve%3A%3Adeqn%3AEquation+or+list+of+equations+expected+instead+of+0+in+the+first+argument+%7Ba%5B1%2Bn%5D%3D%3D%282+a%5Bn%5D%29%2F3%2B1%2F3+a%5B1)
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