Răspuns:
Explicație pas cu pas:
1
7[10+(-3)·5-(-11)]+53=7(10-15+11)+53=7·6+53=42+53=95
2
112=4·28=4²·7=2^4·7
252=4·7·9=2²·3²·7
cmmdc=2²·7=14
cmmmc=2^4·3²·7=1008
3
15/(x+1)∈Z x∈Z
D15=±1, ±3,±5,±15
15=x+1 x=14
15=-x-1 x=-16
15=3(x+1) 5=x+1 x=4
-5=x+1 x=-6
15=5(x+1) 3=x+1 x=2
-3=x+1 x=-4
1=x+1 x=0
-1=x+1 x=-2
S={-16,-6,-4,-2,0,2,4,14}
