help me solve this problem

this is a question from franklin f. kuo's book (network analysis and synthesis)
1.8) suppose the response of a linear system to an excitation e(t) were r(t) = 3exp(-4t). what would the response be to an excitation of e(t-2) ?

Replies

• abhirv
if its an LTI system then even the output will be shifted by the same amount as input....so o/p willbe r(t-2)..!!
• Bishshoy Das
abhirv
if its an LTI system then even the output will be shifted by the same amount as input....so o/p willbe r(t-2)..!!
yes but you have assumed time invariance, which is not mentioned in the problem ! linear systems need not be time invariant !
also if i suppose the response is r(t-2) then the waveform changes. the waveform r(t) and r(t-2) are not same.

3exp(-4*(t-2)) = r(t)*exp(8) !

anybody else wanna help me.
please post a mathematical solution than a logical analysis.
• Bishshoy Das
anybody wanna give the sum a try

You are reading an archived discussion.

TOEFL Vs GRE

i found it good and informative. You need to take the TOEFL exam to prove that you have the required english level to study in an english speaking environment. Beside...

Identify and connect...

Hint : USA citizen (in the box)....Rest are Indians....