Math Problem Statement

Find the first five terms of the given recursively defined sequence: a_n = 3(a_{n-1} - 3) with a_1 = 4.

Solution

The problem asks to find the first five terms of the recursively defined sequence, where the sequence is defined by:

an=3(an13)witha1=4a_n = 3(a_{n-1} - 3) \quad \text{with} \quad a_1 = 4

We will calculate the first five terms step by step using the recursive formula.

Step-by-step calculations:

  1. a1=4a_1 = 4 (Given)
  2. a2=3(a13)=3(43)=3(1)=3a_2 = 3(a_1 - 3) = 3(4 - 3) = 3(1) = 3
  3. a3=3(a23)=3(33)=3(0)=0a_3 = 3(a_2 - 3) = 3(3 - 3) = 3(0) = 0
  4. a4=3(a33)=3(03)=3(3)=9a_4 = 3(a_3 - 3) = 3(0 - 3) = 3(-3) = -9
  5. a5=3(a43)=3(93)=3(12)=36a_5 = 3(a_4 - 3) = 3(-9 - 3) = 3(-12) = -36

The first five terms of the sequence are:

a1=4,a2=3,a3=0,a4=9,a5=36a_1 = 4, \quad a_2 = 3, \quad a_3 = 0, \quad a_4 = -9, \quad a_5 = -36

Would you like more details on the recursive process or further clarification?

Here are 5 related questions to expand on this concept:

  1. What would the next term a6a_6 be in this sequence?
  2. How does this recursive relation behave as nn increases? Does the sequence converge?
  3. Can you derive a general formula for

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Math Problem Analysis

Mathematical Concepts

Recursion
Sequences
Algebra

Formulas

a_n = 3(a_{n-1} - 3)

Theorems

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Suitable Grade Level

Grades 9-12