6. Given a sequence (a) such that a, > a₂ > 0, and an+2=(anti+an), Answer the following questions: (a) Show that for n ≥ 1, for n=1,2,.... (-1) (0₁-02) 2n an+2-an= and hence show that the sequence (a₁, a3, as,} is strictly decreasing and that the sequence {az, a4, ae,) is strictly increasing. (b) For any positive integers m and n, show that 02m

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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6. Given a sequence {a} such that a, > a2 > 0, and
an+2=(an+1+an), for n=1,2,...
Answer the following questions:
(a) Show that for n ≥ 1,
an+2
-An=
and hence show that the sequence (a₁, a3, as,} is strictly decreasing and
that the sequence (az, as, as, is strictly increasing.
(b) For any positive integers m
show that
...
and n
(c) Show that the two sequences
the same limit k, where
(-1)" (a₁-a₂)
2n
azma2n-1.
{as, as, as,) and (a2, as, a6, converge to
k= (a₁ + 2a₂).
Transcribed Image Text:6. Given a sequence {a} such that a, > a2 > 0, and an+2=(an+1+an), for n=1,2,... Answer the following questions: (a) Show that for n ≥ 1, an+2 -An= and hence show that the sequence (a₁, a3, as,} is strictly decreasing and that the sequence (az, as, as, is strictly increasing. (b) For any positive integers m show that ... and n (c) Show that the two sequences the same limit k, where (-1)" (a₁-a₂) 2n azma2n-1. {as, as, as,) and (a2, as, a6, converge to k= (a₁ + 2a₂).
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