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Fed [463]
3 years ago
5

Q # 14. help me please to resolve

Mathematics
1 answer:
ivolga24 [154]3 years ago
4 0

A(n) =2+9(n-1)= 2 + 9n - 9= 9n -7

A(n-1)= 2+9[(n-1)-1]= 2 + 9(n-2)= 2+ 9n - 18= 9n -16

A(n)- A(n-1)= (9n-7)-(9n-16) = -7+16=9

A(n)= A(n-1) +9 is the answer

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