nth term as a+(n-1)d and problem solving (full explanation)

In this video I explain why the nth term of an arithmetic sequence is described by a+(n-1)d and I also show some examples of how to use the expression to find the first term, common difference or nth term.

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For mathematics proofs and workings, go to:

https://www.instagram.com/mathematics.proofs ... https://www.youtube.com/watch?v=Z4oChMYsdi8