Question

va ro ga imi rezolvati ex.5 A si B

Answer 1

 a) D₃₄={1,2,17,34}
3n-1=1
3n=2
n=3/2

3n-1=2
3n=3
n=1

3n-1=17
3n=18
n=6

3n-1=34
3n=35
n=35/3

D₉₈={1,2,7.14,49,98}
5n-1=1
5n=2
n=2/5

5n-1=2
5n=35n-1=14
n=3/5

5n-1=7
5n=8
n=8/5
 
5n-1=14
5n=15
n=3

5n-1=49
5n=50
n=10

5n-1=98
5n=99
n=99/5