Question

Determine the position of a given value.

-3,-8,-13,..........,-58

( what position is -58, in other words )

Answer 1

`-58=-3+(n+1)(-5)`


`-58=-3-5n+5`


`-58=2-5n`


`-60=-5n`


`-60/5=-5n/5`


`n=12`


`-58 \ is \ in \ the \ 12th \ position`