To determine the amount in the bank account at the end of the ninth week.
Amount at the end of the ninth week is
Given:
It is given that the amount in the bank amount at the end of second week is
Formula Used:
An explicit formula for the arithmetic sequence is given by:
Calculation:
A student deposits same amount in the account each week.Sothat according to the given information, the amount at the end of first week is
Hence, the arithmetic sequence is:
with
The common difference is given as:
Now, using an explicit formula to find the amount for ninth week as:
Hence, the amount in the bank account at the end of ninth week is
Chapter 9 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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