You can
put this solution on YOUR website! What is A = a + (n - 1)d and it says
to solve for n
This is a formula for the nth term, A,
of an arithmetic sequence with first
term a and common difference d.
To solve it for n:
A = a + (n - 1)d
A = a + d(n - 1)
A = a + dn - d
A - a + d = dn
Divide both sides by d
A - a + d dn
----------- = ----
d d
1
A - a + d dn
----------- = ----
d d
1
A - a + d
----------- = n
d
A - a + d
n = -----------
d
Edwin
