Question

Question #4aa15

Answer 1

`4(n-1)-1`

Explanation:

Now, let's add 1 to all of the terms in `-1,3,7,11`

=>`0,4,8,12`

They are clearly all multiples of 4.

Since we start at 0, `"the first multiple of 4 starts at the second term"`

This tells us that for `0,4,8,12`, we have to subtract 1 from `n`, and then multiply it by 4.

We have: `4(n-1)`

Now, remember that we got `0,4,8,12` by adding 1 to all the terms of the first sequence.

Therefore, we subtract 1 from our expression.

`4(n-1)=>4(n-1)-1`