Answer:
4181 + 6765 = 10946
Step-by-step explanation:
Fibonacci Sequence: The [tex]$ \textbf{n}^{\textbf{th}} $[/tex] term of a Fibonacci Sequence is given by the sum of the immediate two previous numbers.
In mathematical notation: [tex]$ \textbf{x}_{\textbf{n}} \hspace{1mm} \textbf{=} \hspace{1mm} \textbf{x}_{\textbf{n - 1}} \hspace{1mm} \tetxbf{+} \hspace{1mm} \textbf{x}_{\textbf{n - 2}} $[/tex]
Hence, [tex]$ 21^{st} $[/tex] number = [tex]$ 20^{th} $[/tex] number + [tex]$ 19^{th} $[/tex] number.
= 4181 + 6765
= 10946 which is the required answer.
