Question

Marissa uses this rule to create a pattern. Start with the number 108 and subtract 13

Answer 1

`108 - 13n` is the pattern

Explanation:

We have that,

Initial number for the rule,
`a_(1)` = 108

The next number is obtained by subtracting 13 i.e.
`a_(2)` = 108 - 13

So, third number is
`a_(3)` = (108 - 13) - 13 = 108 - 2×13

Then, fourth number is
`a_(4)` = (108 - 2×13) - 13 = 108 - 3×13

Going on, we get the pattern =
`108 - 13n`.

Hence, using the given rule, we get the pattern to be
`108 - 13n`.