Question

Jutatima va roooog sunt99 de pct dau și coroana ultimele două ex

Answer 1

18)
a) a = (21^n+2-7^n×3^n-84:4^n×440):21^n
a = (21^n+2 - 21^n- 21^n×440):21^n
a = 21^n(441 - 1 - 440) : 21^n
a = 21^n × 0 : 21^n
a = 0

b) b = (45^n+2-9^n+1×5^n+1):(3^2n×5^n)+31
b = (45^n+2-45^n+1) : 45^n+31
b = 45^n+1(45 - 1) : 45^n+31
b = 45^n+1 × 44 : 45^n + 31
b = 45×44+31
b = 2011

c) c = 5^n+4×3^n+1+5^n+1×3^n+3+15^n
c = 5^n+1 × 3^n+1 × (5^3 + 3^2) + 15^n
c = 15^n+1 × (125+8) + 15^n
c = 15^n × ( 15 × 133 + 1)
c = 15^n × 1996