If \(\sum_{i=1}^{20}\left(\frac{{ }^{20} C_{i-1}}{{ }^{20} C_i+{ }^{20} C_{i-1}}\right)^3=\frac{....

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If \(\sum_{i=1}^{20}\left(\frac{{ }^{20} C_{i-1}}{{ }^{20} C_i+{ }^{20} C_{i-1}}\right)^3=\frac{k}{21}\), then \(k\) equals: πŸ“²PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live



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