III gimnazjum

Matematyka z plusem 3

a)f(0)=03=0 f(1)=13=1

a)f(3)=2⋅3−5=6−5=1 &nbsp; A=(3,1) &nbsp; f(−1)=2⋅(−1)−5=−2−5=−7

a) Podstawiamy kolejno współrzędne punktów A, B, C i sprawdzamy czy wychodzi sprzeczność, czy nie A 0=1+31−1​ &nbsp; 0=40​ &nbsp; 0=0 &nbsp;prawda, czyli punkt A należy do wykresu funkcji

Liczba jest miejscem zerowym, jeśli wartość przyjmowana przez funkcję dla tej liczby wynosi 0. &nbsp; a)f(0)=0+3<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​=0 f(−3)=−3+3<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​=0<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​=0 f(3)=3+3<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​=6<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​=0 Miejscem zerowym funkcji f jest&nbsp; x=−3. &nbsp;&nbsp;

a)4⋅1−213​=4−21​=321​ &nbsp; &nbsp; &nbsp; A=(1,321​) &nbsp; 4⋅3−233​=12−227​=12−1321​=−121​ &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B=(3,−121​) &nbsp;

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