Odpowiedzi

2010-01-06T21:04:16+01:00
A₁ = 4

a₂=22

a(do n)=a₁+(n-1)r

22=4+(7-1)r

18=6r
r=3

a₁ = 4

a₂ = a₁+r = 7

a₃ = a₁+2r = 10

a₄ = a₁+3r = 13

a₅ = a₁+4r = 16

a₆ = a₁ + 5r = 19

a₇ = 22
5 3 5