Let u solve cu = 0. Show that any derivative, say w = uxt, also solves cw = 0. In cu = 0, u = u(t, x) do the change of variables
(ξ, η) specified below, to find the equation for v(ξ, η). Is it vξξ − c 2vηη = 0? (a) Translation ξ = t − T, η = x − y where y, T are fixed. (b) Dilation ξ = at, η = ax for any constant a. (c) Find the change of variables (ξ, η) = (?, ?) such that v(ξ, η) satisfies 1v = vξξ −vηη = 0
1 answer:
You might be interested in
Answer:
$80 billion
Step-by-step explanation:
From the graph, we have the following:
Required
Determine the difference in US and Denmark exports
The difference is calculated as thus:
This gives:
<em>Hence, the difference is $80 billion</em>