(a) Show that, if L[ f ] = F(s), then L[t f (t)]=d F/ds.
Chapter , Problem 35(choose chapter or problem)
(a) Show that, if L[ f ] = F(s), then L[t f (t)]=d F/ds. (b) Using part (a), derive the formula for L[t sint] that is used in this section.
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