Question

L= a+(n-1)d

SOLVE FOR N ​

Answer 1

`n = (l-a)/(d)+1`

Explanation:

`l= a+(n-1)d\\`

`l -a =(n+1)d`

Divide both sides of the equation by d

`(l-a)/(d) = ((n-1))/(d)\\ \\(l-a)/(d) = n-1\\\\(l-a)/(d)+1 = n`