SOLUTION: Write an explicit and recursive formula for the sequence 0.3, 0.7, 1.1, …

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Question 1086825: Write an explicit and recursive formula for the sequence 0.3, 0.7, 1.1, …
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a%5B1%5D=0.3
d=a%5B2%5D-a%5B1%5D=0.7-0.3=0.4
a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad
Substituting,
a%5Bn%5D=0.3%2B%28n-1%29%280.4%29
a%5Bn%5D=0.3%2B0.4n-0.4
highlight%28a%5Bn%5D=0.4n-0.1%29