Ex: Find the Formula and Terms of a Arithmetic Sequence

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This video explains how to find the formula for a arithmetic sequence given information about the sequence.
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I'm a momma looking at ACT questions so I can get a refresher as my sun starts to apply for schools!
Honestly.... it's been a long minute 😁

anarizmoore
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yeah so I'm failing the math portion, anyone got a opening at McDonald's?

infinity
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Now, why would anyone need this? It's absolutely useless in everyday life.

clevc
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Or instead of using equations you probably won't remember in the heat of the moment, just subtract 6 times 79 from 466 to find the first term of the sequence. Then add six to find the second term, and add six to the second term to find the third term. Turns a 4 minute question into a 30 second one so you're not wasting time on the test

Ajsavage
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Saw this crap on my ACT test like people know what an “arithmetic sequence” is

sodacurt
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I am curious how he knew to substitute the 2 and the 3 for n at the end. i get that it represents the 2nd and 3rd sequence but that just didn't make sense. Maybe my assumption was way off here !!!

sherrimoss
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what if you aren't given a common difference.

avasava
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Why? Why would anyone need to know this? I’ve been in the workforce as a project manager for 14 years and NOT once came close to using this nonsense!

Teach kids applied knowledge, not this garbage 😒

beda