44. Suppose that f is a continuous function for t > 0 and is of exponential order. (a) If f(t) → F (s) is a transform pair, prove that F (s) f (t) dt} (s) = L Hint: Let g(t) = S f(t) dt. Then note that g'(t) f (t) and use Proposition 2.1 to compute L{g'(t)}(s). (b) Use the technique suggested in part (a) to find 1 -1 L s (s² + 1)

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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Please see pic 1 for the question and pic 2 for Proposition 2.1.  Thank you.

44. Suppose that f is a continuous function for t > 0 and is
of exponential order.
(a) If f(t) → F (s) is a transform pair, prove that
F (s)
{/ f(t)dt}(s) =
t
S
Hint: Let g(t) = S f(t)dt. Then note that g'(t) =
f (t) and use Proposition 2.1 to compute L{g'(t)}(s).
(b) Use the technique suggested in part (a) to find
1
L-1
s (s² + 1) ]
Transcribed Image Text:44. Suppose that f is a continuous function for t > 0 and is of exponential order. (a) If f(t) → F (s) is a transform pair, prove that F (s) {/ f(t)dt}(s) = t S Hint: Let g(t) = S f(t)dt. Then note that g'(t) = f (t) and use Proposition 2.1 to compute L{g'(t)}(s). (b) Use the technique suggested in part (a) to find 1 L-1 s (s² + 1) ]
5.2 Basic Properties This section will discuss the most important properties of the Laplace transform.
of the Laplace We will state each property in a proposition.
Transform
The Laplace transform of derivatives
The most important property for our purposes is the relationship between the Laplace
transform and the derivative. As we will see, the next proposition is the key tool
when using the Laplace transform to solve differential equations.
PROPOSITION 2.1
Suppose y is a piecewise differentiable function of exponential order. Suppose also
that y' is of exponential order. Then for large values of s,
L(y')(s) = s L(y)(s) – y(0) = sY (s) – y(0),
(2.2)
where Y (s) is the Laplace transform of y.
Transcribed Image Text:5.2 Basic Properties This section will discuss the most important properties of the Laplace transform. of the Laplace We will state each property in a proposition. Transform The Laplace transform of derivatives The most important property for our purposes is the relationship between the Laplace transform and the derivative. As we will see, the next proposition is the key tool when using the Laplace transform to solve differential equations. PROPOSITION 2.1 Suppose y is a piecewise differentiable function of exponential order. Suppose also that y' is of exponential order. Then for large values of s, L(y')(s) = s L(y)(s) – y(0) = sY (s) – y(0), (2.2) where Y (s) is the Laplace transform of y.
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