Question

Daca puteti 3,4 si 5 va rog.Multumesc.Dau la primu coroana

Answer 1

3)

a = 6^(n+3)-6^(n+2) + 6^(n+1) - 6^n =

= 6^n × 6^3 - 6^n × 6^2 + 6^n × 6^1 - 6^n=

= 6^n(6^3 - 6^2 + 6^1 - 1) =

= 6^n(216 - 36 + 6 - 1) = 185 × 6^n = 5 × 37 × 6^n divizibil cu 5 si cu 37

.

4)

48 = 2^4 × 3

96 = 2^5 × 3

cmmdc = 2^4 × 3 = 48

.

5)

14=2 × 7

21 = 3 × 7

cmmmc = 2 × 3 × 7 = 42