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Home Q & A Board Science-Related Homework Help Mathematics Pre-calculus and Functions
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emilyliv emilyliv
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Posts: 154
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3 years ago
determine the general term for the following sequence: 9,17,25,33,...and use it to determine t9
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#1
Educator
3 years ago Edited: 3 years ago, bio_man
9,17,25,33

This sequence has a common difference of 8, which is an indicator that it's an arthimetic progression.

an = a1  + (n-1)d
an = 9 + (n-1)8

To get term 9, sub 9 into n

an = 9 + (9-1)8 = 73

1: 9
2: 17
3: 25
4: 33
5: 41
6: 49
7: 57
8: 65
9: 73

Should be 73

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emilyliv Author
wrote...
#2
3 years ago
one of the options were a) tn= 8n+1 and t9=73, so that would be the overall answer?
wrote...
#3
Educator
3 years ago
Any choice that has t9 = 73 is right

You should always include the options as well
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