# signals, system, transform ch2 hw

Discussion in 'Homework Help' started by ish2k9c, Feb 13, 2014.

1. ### ish2k9c Thread Starter New Member

Feb 13, 2014
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hello I need help on this hw. problem 2.4 edition 5

(a) express y(t) as a function of x(t)
(b) verify your result by checking at least three points in time.
(c) express x(t) as a function of y(t)
(d) verify the results of part (c) by checking at least three points in time

Last edited: Feb 13, 2014
2. ### tshuck Well-Known Member

Oct 18, 2012
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...you should probably upload the problem statement too...

3. ### shteii01 AAC Fanatic!

Feb 19, 2010
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Mind readers have left the building.

4. ### ish2k9c Thread Starter New Member

Feb 13, 2014
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ok, sorry i dont know how to upload a pic, how do i do it ?

5. ### tshuck Well-Known Member

Oct 18, 2012
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Click "Post Reply" when viewing this thread, attach the file using the attachments manager (little paperclip icon), select the file, click "Upload", then click "Post Reply".

If you want to embed the image, copy the link that is generated after uploading the file in the attachment manager and paste it in the popup that appears when you click the "Add image" button...

Feb 13, 2014
7
0

7. ### ish2k9c Thread Starter New Member

Feb 13, 2014
7
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hello i just posted the picture

8. ### shteii01 AAC Fanatic!

Feb 19, 2010
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Write out x(t).

9. ### ish2k9c Thread Starter New Member

Feb 13, 2014
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thats the problem i dont understand it ??? i dont know how to approach it...

10. ### shteii01 AAC Fanatic!

Feb 19, 2010
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x(t) has 4 distinct intervals.

Interval 1.
-10 <= t < -3
What is x(t) in this interval?

Interval 2.
-3 <= t < 4
What is x(t) in this interval?

Interval 3.
4<= t < 8
What is x(t) in this interval?

Interval 4.
8 <= t < 15
What is x(t) in this interval?

11. ### ish2k9c Thread Starter New Member

Feb 13, 2014
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i can see the intervals, do i suppose to solve for t ?

12. ### ish2k9c Thread Starter New Member

Feb 13, 2014
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am i suppose to solve for t ? u(t+3) ???
for the first one ? i have no clue!

13. ### shteii01 AAC Fanatic!

Feb 19, 2010
3,516
515
I have been looking at it. And maybe I am wrong. The length of t is different for the two functions. x(t) is from -10 to 15. y(t) is from -15 to 15, so if x(t) is input to find y(t), then how do you find y(t) when x(t) does not exist in the interval from -15 to -10.

14. ### NguyenDon New Member

Feb 15, 2014
9
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You will probably have to ignore the time interval t < -10 and just give y(t) from t > -10 .