Odpowiedź:
y = - 8 x²
C( [tex]\frac{1}{4} , 2[/tex] )
więc
y = - 8*( [tex]\frac{1}{4}[/tex] )² = - 8*[tex]\frac{1}{16} = - \frac{8}{16} = - \frac{1}{2}[/tex] ≠ 2
Nie
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D ( - [tex]\frac{3}{4} , - 18[/tex] )
y = - 8*( - [tex]\frac{3}{4}[/tex] )² = - 8* [tex]\frac{9}{16} =[/tex] - [tex]\frac{9}{2} = - 4,5[/tex] ≠ - 18
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E ( [tex]\frac{\sqrt{5} }{5} , - \frac{4}{5}[/tex] )
y = - 8* ( [tex]\frac{\sqrt{5} }{5})^2 = -8*\frac{5}{25} = - \frac{8}{5}[/tex] ≠ [tex]- \frac{4}{5}[/tex]
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Verified answer
Odpowiedź:
y = - 8 x²
C( [tex]\frac{1}{4} , 2[/tex] )
więc
y = - 8*( [tex]\frac{1}{4}[/tex] )² = - 8*[tex]\frac{1}{16} = - \frac{8}{16} = - \frac{1}{2}[/tex] ≠ 2
Nie
====
D ( - [tex]\frac{3}{4} , - 18[/tex] )
więc
y = - 8*( - [tex]\frac{3}{4}[/tex] )² = - 8* [tex]\frac{9}{16} =[/tex] - [tex]\frac{9}{2} = - 4,5[/tex] ≠ - 18
Nie
=====
E ( [tex]\frac{\sqrt{5} }{5} , - \frac{4}{5}[/tex] )
więc
y = - 8* ( [tex]\frac{\sqrt{5} }{5})^2 = -8*\frac{5}{25} = - \frac{8}{5}[/tex] ≠ [tex]- \frac{4}{5}[/tex]
Nie
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Szczegółowe wyjaśnienie: