Răspunsuri

2014-07-04T11:43:38+03:00
EXERCITIUL 16
b) 3 la puterea 2n-3 = (3³)⁷ : (3²)²
3 la 2n-3 = 3²¹-3⁴
3 la 2n-3 = 3¹⁷
2n-3=17
2n=17+3
2n=20
n=20/2
n=10

c)5 la puterea 3n+1=(5²)¹¹
5 la3n+1 = 5²²
3n+1=22
3n=22-1
3n=21
n=21:3
n=7

d) 7 la puterea n+1-4=49²*³
7 la n+1-4= 49⁶
7 la n+1-4=(7²)⁶
7la n+1-4=7¹²
n+1-4=12
n+1=12+4
n+1=16
n=16-1
n=15