Question

1.) What is the formula for the nth term of the arithmetic sequence that has a common difference of 8 and a first term of 4?

2.) What is the formula for the nth term of the geometric sequence that has a first term of 2 and a ratio of 3?

Answer 1

surely you have those in your text or notes.

first one:

term(n) = a + (n-1)d
and you know both a and d
term(n) = 4 + (n-1)(8)
= 4 + 8n - 8
= 8n - 4

for the second, go to your text, find the formula for
term(n) of a GS , and plug in your given values

Answer 2

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