3 years ago

Find an equation for the nth term of the arithmetic sequence. 9, 11, 13, 15, ...

Mathematics

1 answer:

Marta_Voda [28]3 years ago

3 0

Answer:

2n+7

Step-by-step explanation:

First lets find the common difference which is 2, now we can use this formula to find the nth term.

an = a1 + (n - 1 ) d

an= 9+(n-1)2

=9+2n-2

=2n+7

To check let's insert n=5, 2(5)=10+7=17.

15+2=17!

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