Răspuns :

Deeadeix28id

Răspuns:

Radical din 90=3 radical din 10

F(3 rad 10)=2,5×3 rad 10-rad 10

F(3rad10)=7,5rad 10 - rad 10

F(3 rad 10)=6,5 rad 10

Pufu128id

Răspuns:

[tex]M(3\sqrt{10},~\frac{13\sqrt{10}}{2})[/tex]

Explicație pas cu pas:

[tex]f: R \rightarrow R\\f(x) = \frac{5}{2}\cdot x-\sqrt{10}\\\\\sqrt{90}=3\sqrt{10}\\\text{Fie $y$ ordonata punctului $M(3\sqrt{10},~y)$}\\\\M\in G_f \Rightarrow f(3\sqrt{10}) = y\\\Rightarrow y=\frac{5}{2}\cdot 3\sqrt{10}-\sqrt{10}=\\=\frac{5\cdot3\sqrt{10}-2\sqrt{10}}{2}=\\=\frac{13\sqrt{10}}{2}\\\\\Rightarrow M(3\sqrt{10},~\frac{13\sqrt{10}}{2})[/tex]

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