Overview: 1 questions will be solved this time.Among them
           ☆1 equations

[ 1/1 Equation]
    Work: Find the solution of equation 2.85*e^(-0.017355)+2.85*e^(-2*0.023206)+2.85*e^(-3*0.021338)+102.85*e^(-4*r) = 100.5114521 .
    Question type: Equation
    Solution:
    the solutions is:
        r≈0.027012 , keep 6 decimal places    
    There are 1 solution(s).

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