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Uloha 2.´ Lod’ sa plav´ı po rieke 3 hodiny. Ide 15 km proti pru´du a potom sa vr´ati. Rieka teˇcie ry´chlost’ou 2 km/h. Ak´a je ry´chlost’ lode a kol’ko trvaju´ jednotliv´e u´seky plavby?
Uloha 4.´ Graf popisuje pulz atl´eta, ktory´ sa zu´ˇcastnˇuje beˇzecky´ch pretekov. Pulz znamen´a poˇcet u´derov srdca za minu´tu a v grafe je zaznamenany´ pred, poˇcas a po su´t’aˇznom behu. Atl´et si najskˆor urobil rozcviˇcku a tesne pred su´t’aˇzny´m behom chv´ıl’u odpoˇc´ıval. Pomocou grafu odpovedzte na ot´azky:
(a) Aky´ bol pulz atl´eta pred rozcviˇckou?
(b) Kedy sa su´t’aˇzny´ beh zaˇcal?
(c) Aky´ bol najvyˇsˇs´ı pulz atl´eta poˇcas su´t’aˇzn´eho behu?
(d) Ako dlho trvalo, ky´m sa pulz atl´eta dostal na hodnotu pred su´t’aˇzny´m behom?
(d) Atl´et beˇzal priemernou ry´chlost’ou 15 km/hod. Na aku´ vzdialenost’ sa su´t’aˇzny´ beh beˇzal?
Uloha 7.´ Naˇcrtnite graf funkcie
a) y = f(1 + |1 − 2x|)
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