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{SECT 0 {EXCHG {PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT 
-1 136 "Here is an example of how to solve and plot a second order lin
ear difference equation.  Use this as a template for the work on the e
xam." }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 0 "" 
}}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 56 "eqn:=x(n+2)-x(n+1)+(1/8)*
x(n)=sin(4*n)+cos(3*n)+exp(-n);" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 
1 0 77 "#To solve the difference equation with initial values x(0)=0 a
nd x(1)=1, use:" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 36 "K:=rsolv
e(\{eqn,x(0)=0,x(1)=1\},x(n));" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 
1 0 12 "with(plots):" }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 44 "poi
ntplot([seq([n,K],n=1..100)],style=line);" }}}{EXCHG {PARA 0 "> " 0 "
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