Consider complete graphs K5 and K6 . Let X5 and X6 are number of perfect matching of K5 and K6 respectively. Then X5 + X6 = ________.
@Ashwani Kumar 2 is it some kind of formula for k6?
@Shubhanshu
Yes.. I wrote here plz check
https://gateoverflow.in/166671/perfect-matching-in-complete-graph#c166760
K2n=( 2n! ) / ( 2^n * n! )
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