Zadání: Bod A grafu funkce g: y = 0,75x – 0,5 má obě souřadnice x, y shodné. Určete souřadnice bodu A.
Řešení:
1) Protože y=x, zbavíme se jedné neznámé
y = 0,75 y – 0,5
2) Převedeme si neznámé na jednu stranu a čísla na druhou
0,25 y = – 0,5
3) Přepočítáme na 1 y
y = – 2
A [- 2, -2]
Časová náročnost: 2-3 minuty
Jedná se o příklad z maturitního testu.
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