Math

QuestionFind the fixed points of the sequence defined by an+1=30ana_{n+1}=\sqrt{30 a_{n}}.

Studdy Solution

STEP 1

Assumptions1. The sequence {an}\left\{a_{n}\right\} is recursively defined by the equation an+1=30ana_{n+1}=\sqrt{30 a_{n}}. . A fixed point of a sequence is a value aa such that f(a)=af(a) = a.

STEP 2

To find the fixed points, we need to set an+1=ana_{n+1} = a_{n} in the recursive equation and solve for ana_{n}.
an=30ana_{n} = \sqrt{30 a_{n}}

STEP 3

Square both sides of the equation to eliminate the square root.
(an)2=30an(a_{n})^2 =30 a_{n}

STEP 4

Rearrange the equation to a standard quadratic form.
(an)230an=0(a_{n})^2 -30 a_{n} =0

STEP 5

Factor out ana_{n} from the equation.
an(an30)=0a_{n}(a_{n} -30) =0

STEP 6

Set each factor equal to zero and solve for ana_{n}.
an=0a_{n} =0an30=0an=30a_{n} -30 =0 \Rightarrow a_{n} =30The fixed points of the sequence {an}\left\{a_{n}\right\} are0 and30.

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