1.

Find the expression of f (t) in the graph shown in question 5?

A. 10t [u (t) – u (t – 1)] – (-10t+20) [u (t-1) – u (t-3)] + (20t – 40) [u (t-3) – u (t-4)].
B. 10t [u (t) – u (t – 1)] – (-10t+20) [u (t-1) – u (t-3)] – (20t – 40) [u (t-3) – u (t-4)].
C. 10t [u (t) – u (t – 1)] + (-10t+20) [u (t-1) – u (t-3)] + (20t – 40) [u (t-3) – u (t-4)].
D. 10t [u (t) – u (t – 1)] + (-10t+20) [u (t-1) – u (t-3)] – (20t – 40) [u (t-3) – u (t-4)].
Answer» D. 10t [u (t) ‚Äö√Ñ√∂‚àö√ë‚àö¬® u (t ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1)] + (-10t+20) [u (t-1) ‚Äö√Ñ√∂‚àö√ë‚àö¬® u (t-3)] ‚Äö√Ñ√∂‚àö√ë‚àö¬® (20t ‚Äö√Ñ√∂‚àö√ë‚àö¬® 40) [u (t-3) ‚Äö√Ñ√∂‚àö√ë‚àö¬® u (t-4)].


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