Linear Sequences - formula for the n-th term

Linear Sequences, how to find the formula for the n-th term.
Linear sequences of numbers are characterized by the fact that to get from one term to the next we always add the same amount.
We learn the formula as well as see how to use it with a couple of detailed examples.

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[aidanaabibulla]

Wooow Thank u soooo much, sir!!! I have watched a million videos but yours is the best! Thank you!!!

[shanurmohammed]

Sir i have another way to find the n. Idk if its a smart way or not but.

I normally just write the diffrence with the n. Then i go to the first number in the sequence and i just go back from how much the n number is.

[princessofgold]

Thank you so much. This help me with my revision studying.

[junaiddooast]

hats off can't believe i have understood it

[disappointedshrek]

a is the first difference
u1 is the first term
a=-3
a+b=u1
-3+b=14
b=17

forkula=un=-an+b
un=-3n+17

[adityaadit]

Excuse me, I want to ask
Why is this sequence different with the sequence that I learned in Algebra 1?