Let \( D_{n} \) represents derangement of ' \( n \) ' objects. If \... VIDEO
Let \( D_{n} \) represents derangement of ' \( n \) ' objects. If \( D_{n+2}=a D_{n+1}+b D_{n} \forall n \in N \), then find \( \frac{b}{a} \)https://bit.ly/YTAI_PWAP https://www.pw.live
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