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MA 212 Further Mathematical Method (Calculus) - London School of Economics. Solutions Section A and B.
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April 2023

2022/2023

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MA 212 Further Mathematical Method (Calculus) - London School of Economics. Solutions Section A and B.The Laplace transform is de…ned by Lff(t)g = Zt=0 1 estf(t)dt. We have Lff0(t)g = sLff(t)g f(0 ). Indeed, integrating by parts, we get Lff0(t)g = Zt=0 1 estf0stf(t)]1 0 Zt=0 1(s)estf(t)dt = sLff(t)g f(0): We used that f is of exponential growth at most to deduce that estf(t) ! 0 as t ! 1. For g(t) = Zu=0 t h(u) du, we have g(0) = 0 and g0(t) = h(t) (by the Fundamental Theorem of Calculus). Hen...
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