Question

- 1 atta
Here are the first 5 terms of an arithmetic sequence.
3
9
15
21
27
(a) Find an expression, in terms of n, for the nth term of this sequence.
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Answer 1

a=3

a2=9

a2-a=d

9-a=6

an=a=(n-1)d

an=3+(n-1)6

an=3+6n-6

an=-3+6n

an=-3+6n

Answer 2

THE ABOVE ANSWER IS CORRECT

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