1. ## Arithmetic series question

A common interest in constant. It's $25 per year. Initial deposit is$500. After 10 years the amount of money in the account was $750. Using the arithmetic sequence which is tn= a+(n-1)d. Can you find how much money is in the account after 20 years? 2. Originally Posted by muhammadque A common interest in constant. It's$25 per year. Initial deposit is $500. After 10 years the amount of money in the account was$750. Using the arithmetic sequence which is tn= a+(n-1)d. Can you find how much money is in the account after 20 years?
It's $25 per year. $d=+25$ Initial deposit is$500.
$a$ is greater than or equal to 500.

After 10 years the amount of money in the account was \$750.
$T_n=a+(n-1)d$
$T_{10}=a+(10-1)d$
$a=$?

After 20 years.
$T_{20}=$?