Odpowiedź:
f ( x) = 2 x² - x - 3
a = 2 b = - 1 c = - 3
więc p = [tex]\frac{- b}{2*a} = \frac{1}{2*2} = \frac{1}{4}[/tex]
q = f ( p) = f ( [tex]\frac{1}{4} ) = 2*(\frac{1}{4} )^2 - \frac{1}{4} - 3 = \frac{1}{8} - \frac{2}{8} - 3 = - 3 \frac{1}{8}[/tex]
W = ( p, q ) = ( [tex]\frac{1}{4} , - 3 \frac{1}{8}[/tex] )
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II sposób :
p = [tex]\frac{1}{4}[/tex] - jak wyżej
Δ = b² - 4a*c = ( - 1)² - 4*2*(- 3) = 1 + 24 = 25
q = - Δ : ( 4 a) = - 25 : ( 4*2) = - 25 : 8 = - 3 [tex]\frac{1}{8}[/tex]
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Verified answer
Odpowiedź:
f ( x) = 2 x² - x - 3
a = 2 b = - 1 c = - 3
więc p = [tex]\frac{- b}{2*a} = \frac{1}{2*2} = \frac{1}{4}[/tex]
q = f ( p) = f ( [tex]\frac{1}{4} ) = 2*(\frac{1}{4} )^2 - \frac{1}{4} - 3 = \frac{1}{8} - \frac{2}{8} - 3 = - 3 \frac{1}{8}[/tex]
W = ( p, q ) = ( [tex]\frac{1}{4} , - 3 \frac{1}{8}[/tex] )
========================
II sposób :
p = [tex]\frac{1}{4}[/tex] - jak wyżej
Δ = b² - 4a*c = ( - 1)² - 4*2*(- 3) = 1 + 24 = 25
q = - Δ : ( 4 a) = - 25 : ( 4*2) = - 25 : 8 = - 3 [tex]\frac{1}{8}[/tex]
==========================================
Szczegółowe wyjaśnienie: