Question

Exercitiul 9 va rog repede

Answer 1

x+1|12
x+1∈D12
x+1∈{1,2,3,4,6,12} se scade 1
x∈{0,1,2,3,5,11}
A={0,1,2,3,5,11}

2x+1∈D15
2x+1∈{1,3,5,15}
2x∈{0,2,4,14} se imparte la 2
x∈{0,1,2,7}
B= {0,1,2,7}

d. (x+2)∈D36
x+2∈{1,2,3,4,6,9,12,18,36}
x∈{0,1,2,4,7,10,16,34}
D={0,1,2,4,7,10,16,34}

x-1∈D24
x-1∈{1,2,3,4,6,8,12,24} adun 1
x∈{2,3,4,5,7,9,13,25}
C={2,3,4,5,7,9,13,25}