Find the function f3 (t) from the time t = 3 to 4 sec.

MCQOPTIONS

1.	Find the function f₃ (t) from the time t = 3 to 4 sec.
A.	(20t 40) [u (t-3) u (t-4)]
B.	(20t + 40) [u (t-3) u (t-4)]
C.	(20t + 40) [u (t-3) + u (t-4)]
D.	(20t 40) [u (t-3) + u (t-4)]
Answer» B. (20t + 40) [u (t-3) u (t-4)]

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