Question

Dany jest ciag aryt 3, 8,13... podaj a1, r, a40, a60

Answer 1

r=8-3=5
a₁=3
an=a₁+r(n-1)
a₄₀=3+5*39 = 3+195=198
a₆₀=3*5*59=3+295 = 298

Answer 2

3,8,13...
r=5
a1=3
a40=3+(40-1)*5=3+39*5=3+195=198
a60=3+(60-1)*5=3+59*5=3+295=298