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Rachel98
 3 years ago
Please help. Write a rule for the nth term of the sequence. Use your rule to find a100.–8, 9, 26, 43, 60, . . .
Rachel98
 3 years ago
Please help. Write a rule for the nth term of the sequence. Use your rule to find a100.–8, 9, 26, 43, 60, . . .

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BluFoot
 3 years ago
Best ResponseYou've already chosen the best response.0Your sentence seems scrambled... "Use your rule to find a100.–8" What's going on there?

Rachel98
 3 years ago
Best ResponseYou've already chosen the best response.0Use your rule to find a100. The sequence is –8, 9, 26, 43, 60, . . .

BluFoot
 3 years ago
Best ResponseYou've already chosen the best response.0OK look at the difference between the consecutive numbers in the sequence. How much between 8 and 9? How much between 9 and 26? Do you see a pattern?

Rachel98
 3 years ago
Best ResponseYou've already chosen the best response.0Yeah, I see an increase of 17

BluFoot
 3 years ago
Best ResponseYou've already chosen the best response.0Good. So your rule "a" will look like: a = 17n + b where n is the "nth" term in the sequence b is some number. To solve for b, take the first number in the sequence (n=1, 1st number). When n=1, a=8. So: a = 17n + b 8 = 17*1 + b Can you solve for b?

Rachel98
 3 years ago
Best ResponseYou've already chosen the best response.0Umm... I'm not really sure.  8 = 17*1 + b =  8 = 17 + b. subtract 17 from both sides?  25 = b?
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