A population N(t) is controlled by the ordinary differential equation (ODE) dN dt with values A =2, B =18, C =36. dN dt = (a) The right-hand side function f(N) can be factorised and re-arranged, to give the form f(N) = −AN³ + BN² - CN, = rN where r is a per-capita growth rate, and K₁ and K₂ are theoretical carrying capacities, ordered such that 0 < K₁ < K₂. Nx,1 For the specific values of A, B and C given above, state the values required for this form: r= K₁ = , K₂ = 1 N N (K-¹) (¹ - K), 1 1- K₁ = . (b) From the form derived in part (a), identify the fixed points N₁,1, N.,2, N.,3, ordered such that N*,1 < N,2 < N*,3. (Note that numerical values are required here, based on the specific values of A, B and C given above.) , N*,2 = , N*,3 =

Calculus: Early Transcendentals
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ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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c(i)
For each fixed point identifed in part (b),
identify whether is it stable or unstable.
Nx,1 is:
stable O unstable
c(ii)
N*,2 is:
stable
c(iii)
N*,3 is:
stable
O unstable
unstable
Transcribed Image Text:c(i) For each fixed point identifed in part (b), identify whether is it stable or unstable. Nx,1 is: stable O unstable c(ii) N*,2 is: stable c(iii) N*,3 is: stable O unstable unstable
A population N(t) is controlled by the ordinary
differential equation (ODE)
dN
dt
with values A =2, B =18, C=36.
(a)
The right-hand side function f(N) can be
factorised and re-arranged, to give the form
= f(N) = −AN³ + BN² - CN,
dN
N
AN-N (-1) (1-X).
= rN
dt
where r is a per-capita growth rate, and
and K₂ are theoretical carrying capacities,
ordered such that 0 < K₁ < K₂.
For the specific values of A, B and C given
above, state the values required for this form:
r =
N*,1
"
=
K₁
=
(b)
From the form derived in part (a), identify the
fixed points N*,1, N*,2, N+,3, ordered such
that N*,1 < N*,2 < N*,3.
(Note that numerical values are required here,
based on the specific values of A, B and C
given above.)
1
, K₂=
1
N+,2
=
, N*,3
=
Transcribed Image Text:A population N(t) is controlled by the ordinary differential equation (ODE) dN dt with values A =2, B =18, C=36. (a) The right-hand side function f(N) can be factorised and re-arranged, to give the form = f(N) = −AN³ + BN² - CN, dN N AN-N (-1) (1-X). = rN dt where r is a per-capita growth rate, and and K₂ are theoretical carrying capacities, ordered such that 0 < K₁ < K₂. For the specific values of A, B and C given above, state the values required for this form: r = N*,1 " = K₁ = (b) From the form derived in part (a), identify the fixed points N*,1, N*,2, N+,3, ordered such that N*,1 < N*,2 < N*,3. (Note that numerical values are required here, based on the specific values of A, B and C given above.) 1 , K₂= 1 N+,2 = , N*,3 =
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