Question

Oblicz a1 i a12 w ciągu danym wzorem an=4n - 9

Answer 1

a1= 4*1-9

a1=4-9

a1=-5

 

a12=4*12-9

a12=48-9

a12=39

 

Pozdrawiam serdecznie :)))

Answer 2

an=4n - 9

a₁=4 * 1 - 9 = 4 - 9 = -5

a₁₂= 4 * 12 - 9 = 48 - 9 = 39