Question

E1Sa se scrie permutarile multimilor:
a)A={1,2,3}
b)A={-1,2,3}
c)A={2,-1,3}

Answer 1

a) A= 1! + 2! +3! = 1+1*2+1*2*3=9
b) B= -1! +2! +3! = -1+1*2+1*2*3=7
c) C= 2! + (-1)! + 3! = 1*2-1+1*2*3=7
Sper ca am facut bine,nu mai stiu nici eu exact.