Odpowiedź :
* f(- 4) = - 1/2 * (- 4) + 1 = 2 + 1 = 3
* f(- 2 ) = - 1/2 * (- 2) + 1 = 1 + 1 = 2
* f(0) = - 1/2 * 0 + 1 = 1
* - 1/2 = - 1/2 x + 1
- 1/2 - 1 = - 1/2 x
- 3/2 = - 1/2 x /:(- 1/2)
- 3/2 * (-2) = x
3 = x
* f(4) = - 1/2 * 4 + 1 = -2 + 1 = - 1
* - 4 = - 1/2 x + 1
-5 = - 1/2 x /:(- 1/2)
-5 * (-2) = x
10 = x
Odpowiedź:
y = - 1/2x + 1
Dane do tabelki
x = - 4 , to f(x) = - 1/2 * (- 4) + 1 = 4/2 + 1 = 2 + 1 = 3
x = - 2 , to f(x) = - 1/2 * ( - 2) + 1 = 2/2 + 1 = 1 + 1 = 2
x = 0 , to f(x) = - 1/2 * 0 + 1 = 0 + 1 = 1
f(x) = - 1/2 , to x = ( - 1/2 - 1) : ( - 1/2) = - (1/2 + 1) : (- 1/2) = 1 1/2 : 1/2 = 3/2 * 2 = 3
x = 4 , to f(x) =- 1/2 * 4 + 1 = - 2 + 1 = - 1
f(x) = - 4 , to x= (- 4 - 1) : (- 1/2) = - 5 : (- 1/2) = 5 : 1/2 = 5 * 2 = 10
Tabelka
x - 4 - 2 0 3 4 10
f(x) 3 2 1 - 1/2 - 1 - 4
Wykres w załączniku (czerwonymi punktami oznaczono punkty z tabelki )