Question

(t-1) u(t-5)

is this f(t) u(t-a)? or f(t-a) u(t-a)?

Answer 1

if the question isnt clear im asking if (t-1) is f(t) or f(t-a)

Answer 2

...i think it's f(t)...since a seems to be 5 in this problem

Answer 3

it is the first one because a=5 but in f(a) it is 1

Answer 4

yeahh i thought so... f(t + a) = t + 4 right?

Answer 5

it would have been in the second form f(t-a)u(t-a)
if the question was
(t-5)u(t-5) .

Answer 6

....so f(t+a) is t+4...?

Answer 7

yes it should be t+4

Answer 8

guys what is definition of \(f(t-a)\) ?

Answer 9

a is just a variable...i think this is just algebra...

Answer 10

a is constant.

Answer 11

uhh yeah that

Answer 12

it is f(t) shifted by a units to the right....

Answer 13

@sami-21 you wont happen to know about laplace of heaviside functions would you? because my next post will be one...

Answer 14

i do know that !