http://scindeks-clanci.nb.rs/data/pdf/0546-8264/2008/0546-82...

U prvom bloku izvedena je nastava iz procentnog računa, direktne i obrnute proporcije i verižnog računa, dok su u okviru drugog bloka obrañeni račun mešanja i račun podele.

Themes from the first block lectures were: percentage calculus, direct and indirect proportion and “chain” calculus, and from the second block lectures: mixing calculus and profit sharing calculus.



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Note added at 18 hrs (2010-01-03 09:52:56 GMT)
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Da bi se pogledao navedeni tekst (na srpskom i engleskom jeziku - paralelno) otvoriti pdf dokument ("pun tekst" na levoj strani stranice koja vam se otvori kada kliknete na navedei link).

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Note added at 18 hrs (2010-01-03 10:22:03 GMT)
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Ovo je tipičan problem mešanja ali nešto složeniji (uvedena je zavisnost od vremena):
http://www.math.uwo.ca/courses/Online_calc_notes/081/unit8/U...
(2) A mixing problem. A tank contains 100 L of pure water. Brine containing 1 g of salt per litre enters the tank at a rate of 1 L/min. The solution is kept well stirred and drains from the tank at the same rate of 1 L/min, so the volume of solution in the tank is 100 L at all times. Let us find the amount y(t) of salt in the tank at time t. (Time t is measured in minutes and the clock starts ticking when the brine starts entering the tank.)