Show that the sequence {an}is a solution of

Glen Nambahin

Glen Nambahin

Answered question

2022-09-07

Show that the sequence {an}is a solution of the recurrence relation an = an−1 + 2an−2 + 2n − 9 if a) an = −n + 2.

 

Answer & Explanation

Eliza Beth13

Eliza Beth13

Skilled2023-05-31Added 130 answers

To show that the sequence {an} is a solution of the recurrence relation an=an1+2an2+2n9 with an=n+2, we need to substitute the given value of an into the recurrence relation and verify that it holds true.
Let's substitute an=n+2 into the recurrence relation:
n+2=(n+1)+2(n+2)+2n9
Now, let's simplify the equation:
n+2=n+12n+4+2n9
Simplifying further:
n+2=n4+19
Combining like terms:
n+2=n12
We can see that both sides of the equation are equal. Therefore, the sequence {an} with an=n+2 is indeed a solution of the given recurrence relation an=an1+2an2+2n9.
This demonstrates that the sequence {an}, defined as an=n+2, satisfies the given recurrence relation.

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