Hi guys, im stuck on a problem, this is it: ------ Let f(x) = - u''(x)/u'(x) Show that if f(x) is decreasing then u'''(x) is greater than 0. ---- Thanks Guys, ive been at it for a while and cant get it
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Originally Posted by furnis1 Hi guys, im stuck on a problem, this is it: ------ Let f(x) = - u''(x)/u'(x) Show that if f(x) is decreasing then u'''(x) is greater than 0. ---- Thanks Guys, ive been at it for a while and cant get it If then . If then so so giving so . You need the product. It is possible to come up with a function that . Case in point so yet which is not always positive for all x
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