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           ☆1 equations

[ 1/1 Equation]
    Work: Find the solution of equation 20lg12-20lgx-10log(1+x^2) = -4.77 .
    Question type: Equation
    Solution:
    the solutions is:
        x≈2.366529 , keep 6 decimal places    
    There are 1 solution(s).

解方程的详细方法请参阅：《方程的解法》

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