Odd and Even Cases

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Questions and Answers

For odd values of n, how is $(y_n)0$ expressed in terms of $(y{n-2})_0$?

  • $(y_n)_0 = [(n-2)^2 + a^2](y_{n-2})_0$
  • $(y_n)_0 = [(n+2)^2 - a^2](y_{n-2})_0$
  • $(y_n)_0 = [n^2 - a^2](y_{n-2})_0$
  • $(y_n)_0 = [(n-2)^2 - a^2](y_{n-2})_0$ (correct)

When n is even, what is the general solution for $(y_n)_0$?

  • $(y_n)_0 = 0$ (correct)
  • $(y_n)_0 = a^2$
  • $(y_n)_0 = n^2 - a^2$
  • $(y_n)_0 = 1$

Given that $(y_3)_0 = (3^2 - a^2)(y_1)_0$ and $(y_1)_0 = a$, what is the expression for $(y_5)_0$?

  • $(y_5)_0 = (5^2 - a^2)a$
  • $(y_5)_0 = (3^2 - a^2)(1 - a^2)a$
  • $(y_5)_0 = (5^2 + a^2)(3^2 + a^2)a$
  • $(y_5)_0 = (5^2 - a^2)(3^2 - a^2)a$ (correct)

For odd values of n, the expression for $(y_n)_0$ is a product of terms. What is the last term in this product?

<p>$(1 - a^2)$ (D)</p> Signup and view all the answers

If n is odd and $(y_1)_0 = a$, what does $(y_3)_0$ equal?

<p>$(3^2 - a^2)a$ (C)</p> Signup and view all the answers

When n is even, how does $(y_n)0$ relate to $(y{n-2})_0$?

<p>$(y_n)<em>0 = (n^2 - a^2)(y</em>{n-2})_0$ (A)</p> Signup and view all the answers

If n is odd, which of the following represents the general form of $(y_n)_0$?

<p>A product of terms dependent on <em>n</em> and <em>a</em> (B)</p> Signup and view all the answers

For even values of n, what is a key characteristic of the solution for $(y_n)_0$?

<p>The solution is always zero. (B)</p> Signup and view all the answers

When n is odd, what is the general pattern of terms in the expression for $(y_n)_0$?

<p>A series of terms $(k^2 - a^2)$ where <em>k</em> decreases by 2. (C)</p> Signup and view all the answers

What is the value of $(y_2)_0$ when n is even?

<p>0 (C)</p> Signup and view all the answers

If n is even, how does the value of a influence the general solution for $(y_n)_0$?

<p>The value of a always cancels out, leading to a zero solution. (C)</p> Signup and view all the answers

If $(y_1)_0 = a$ and n is odd, which expression represents how the terms change recursively?

<p>Each subsequent term is multiplied by $( (n-k)^2 - a^2 )$, where k increments by 2. (A)</p> Signup and view all the answers

Based on the pattern, what can we infer about the behavior of solving for even n values?

<p>It always results in zero. (C)</p> Signup and view all the answers

If we know $(y_5)_0$ for a specific value of 'a' when n is odd, how can we determine $(y_7)_0$?

<p>Multiply $(y_5)_0$ by $(7^2 - a^2)$ (C)</p> Signup and view all the answers

What is a critical difference in the solutions for $(y_n)_0$ between even and odd values of n?

<p>For even <em>n</em>, the solution is zero; for odd <em>n</em>, it is a function of <em>n</em> and <em>a</em>. (C)</p> Signup and view all the answers

When finding $(y_n)_0$ for odd values of n, how does increasing n affect the complexity of the expression?

<p>The expression becomes more complex, with additional multiplicative terms. (B)</p> Signup and view all the answers

For even n, what conclusion can be made about the value of $(y_n)_0$ regardless of the parameter a?

<p>It is always zero. (D)</p> Signup and view all the answers

What is the significance of the recursive relationship $(y_n)_0 = (n-2)^2 - a^2_0$ for odd n?

<p>It demonstrates how each term depends on the term two steps prior. (C)</p> Signup and view all the answers

What is the primary factor that determines the value of $(y_n)_0$ when n is even?

<p>The initial condition that $(y_2)_0 = 0$. (C)</p> Signup and view all the answers

Flashcards

(y_n)_0 when n is odd

When n is odd, the general form of (y_n)_0 involves the product of terms (k^2 - a^2) up to a final constant 'a'.

Recursive Formula for (y_n)_0

A recursive formula expressing (y_n)0 in terms of (y(n-2))_0, where the initial condition affects the subsequent values.

(y_n)_0 when n is even

When n is an even number, (y_n)_0 equals 0.

What is (y_n)_0?

A mathematical expression evaluated at zero, denoted as (y_n)_0

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Study Notes

  • Case 1: When n is odd
  • n = 1, 3, 5, ..., (n - 2) in (4)
  • When n = 1:
    • (y3)0 = (1² - a²)(y1)0 = (1² - a²)a
  • When n = 3:
    • (y5)0 = (3² - a²)(y3)0 = (3² - a²)(1² - a²)a
  • When n = 5:
    • (y7)0 = (5² - a²)(y5)0
    • (5² - a²)(3² - a²)(1² - a²)a
  • Similarly, when n = n - 2:

Case 2: When n is even

  • n = 2, 4, 6, ..., (n - 2) in (4) we get
  • When n = 2:
    • (y4)0 = (2² - a²)(y2)0 = (2² - a²)*0 = 0, (y2)0 = 2
  • When n = 4:
    • (y6)0 = (4² - a²)(y4)0 = (4² - a²)*0 = 0
  • When n = 6:
    • (y8)0 = (6² - a²)(y6)0 = (6² - a²)*0 = 0
  • Similarly, for all even values of n:
    • (yn)0 = 0

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