Big Ideas Math Integrated I, 2016
BI
Big Ideas Math Integrated I, 2016 View details
6. Recursively Defined Sequences
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Exercise 17 Page 318

Use a table to organize the terms and find the pattern.

a_1=0, a_n=a_(n-1)-3

Practice makes perfect
To write a recursive rule for the given sequence, we will use a table to organize the terms and find the pattern.

The sequence is arithmetic, with first term a_1=0 and common difference r=- 3. To write the recursive rule, we will substitute these values into the general formula for the recursive rule of a arithmetic sequence. la_1=a a_n=a_(n-1)+d ⇒ la_1= 0 a_n=a_(n-1) - 3