Question: need solution urgently 21. Let A(x) = > 2, aix', where a; is the number of all graphs on vertex set in that have exactly

need solution urgently

need solution urgently 21. Let A(x) = > 2, aix', where a;

21. Let A(x) = > 2, aix', where a; is the number of all graphs on vertex set in that have exactly i edges. Find a closed formula for A(x)

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