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Tečna grafu funkce
Sestrojte tečnu grafu funkce y = ln(x+2), je-li dán její směrový vektor.
Při odhad bodu dotyku T je sestrojen obecný bod M na grafu funkce. Pohybujte bodem M tak, aby tečna [math]t_M[/math] byla rovnoběžná s vektorem u.