Question

the following is a linear sequence. 1, 4, 7, 10, 13...

using the explicit formula 3n - 2 find the 90th term in the sequence.

A. 90
B. 270
C. 268
D. 265

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Answer 1

We have

$a_n = 3n - 2$

We're asked for $a_{90}$

$a_{90} = 3(90) - 2 = 268$

Answer: C 268