matlab question regarding two differential equation

Y(k)=W(k)-3/2W(k+2)+1/2W(k+1),
W(k+3)=U(k)-5/8W(k)+3/8W(k+1)-1/4W(k+2),
U(k)=(2/3)^k, k>0

[Star Strider]

And your question being ... ?

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

http://www.mathworks.com/matlabcentral/answers/728-how-do-i-write-a-good-question-for-matlab-answers

Answer 1

[Ellen]

My question is plot Y(k), W(k) and U(k)