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What are the first five terms of the arithmetic progression with the first term 8 and common difference 7 , then find the 17th?.

Respuesta :

reinhard10158

Step-by-step explanation:

a1 = 8

a2 = 8 + 7 = 15

a3 = 15 + 7 = 22

a4 = 22 + 7 = 29

a5 = 29 + 7 = 36

an = an-1 + 7 = a1 + 7×(n-1)

a17 = 8 + 7×16 = 8 + 112 = 120

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