Question

Determinati elementele multimii:
B={n∈N/ {1}/13 supra n-1 ∈N}

Answer 1

Divizorii lui 13 ={ 1, 13}
=> n -1 = 1
n= 1+1
n = 2


=> n -1 = 13
n = 13+1
n = 14


=> B={2, 14}