
Concept explainers
(a)
To prove: that
(a)

Explanation of Solution
Given information:
Let
Calculation:
We need to use mathematical induction to prove that
Fibonacci sequence is defined as follows
Thus,
For
Assume
Thus, by mathematical induction, the formula is valid for all integers
(b)
To find: the sum of the first 20 terms of the Fibonacci sequence.
(b)

Answer to Problem 8PS
The Sum of first 20 terms of the Fibonacci sequence is 17710.
Explanation of Solution
Calculation:
From (a) above, we can write the formula for first 20 terms of the sequence, that is,
Thus, the sum of first 20 terms of the Fibonacci sequence is 17710.
Chapter 9 Solutions
Precalculus with Limits
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