If \( x+y=1 \), then \( \sum_{r=0}^{n} r^{2 n} C_{r} x^{r} y^{n-r} \) equals.... VIDEO
If \( x+y=1 \), then \( \sum_{r=0}^{n} r^{2 n} C_{r} x^{r} y^{n-r} \) equalshttps://bit.ly/YTAI_PWAP https://www.pw.live
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