Oblicz
Ngc6334: Oblicz: (11*1!)*(22*2!)*(33*3!)*...*(nn*n!)
23 sie 19:41
Saizou :
11*1!=11*1
22*2!=22*1*2
33*3!=33*1*2*3
...
(n−1)n−1*(n−1)!=(n−1)n−1*1*2*3*...*(n−1)
nn*n!=nn*1*2*3*...*(n−1)*n
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(11*1!)(22*2!)....(n*n!)=11*22*33*...*(n−1)n−1*nn*1n*2n−1*3n−2*...*(n−1)2*n=
1n+1*2n+1*...*nn+1=(1*2*3*....*n)n+1=(n!)n+1
23 sie 20:18