Question

For the sequence an = 4n + 5 how do you find the first five terms?

Answer 1

The first five terms are
`color(blue)(9,13,17,21,25`

Explanation:

`a_n=4n+5`

We can find terms `1` to `5` by substituting `n` respectively in the expression.

`a_n=4n+5`

So,
`a_color(blue)(1) = 4 *color(blue)((1)) +5=9`

`a_color(blue)(2 ) = 4 *color(blue)((2)) +5=13`

`a_color(blue)(3) = 4 *color(blue)((3)) +5 =17`

`a_color(blue)(4) =4 *color(blue)((4)) +5= 21`

`a_color(blue)(4) =4 *color(blue)((5)) +5= 25`