3 years ago

!!! PLEASE HELP ME !!!

1 answer:

5 0

Recursive formula= a(n)=a(1)(n-1)+d
a(n)= 9(n-1)+2

explicit formula= a(n)= a(1)+(n-1)d
a(n)= 9+(n-1)2

12th row= a(12)=9+(12-1)2
a(12)=9+11(2)
a(12)=9+22
a(12)=31

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