Odpowiedź:
Szczegółowe wyjaśnienie:
(x³-3x²-4x+10):(x-3)= x²-4
-x³+3x²
----------
= = -4x+10
+4x-12
----------------------
= -2
Sprawdzam
W(3)=27-27-12+10=-2
II sposób dzielenia (schemat Hornera)
1 -3 -4 10
3 0 3 0 -12
1 0 -4 -2
d)
((-1/2)x³+2x²+x-4):(x+1)=(-1/2)x²+(5/2)x-(3/2)
(1/2)x³ +(1/2)x²
-------------------------
= (5/2)x²+x
(-5/2)x²-(5/2)x
--------------------------
= -(3/2)x-4
(3/2)x+(3/2)
-----------------------
= -5/2
W(-1)=(1/2)+2-1-4=-5/2
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Odpowiedź:
Szczegółowe wyjaśnienie:
(x³-3x²-4x+10):(x-3)= x²-4
-x³+3x²
----------
= = -4x+10
+4x-12
----------------------
= -2
Sprawdzam
W(3)=27-27-12+10=-2
II sposób dzielenia (schemat Hornera)
1 -3 -4 10
3 0 3 0 -12
1 0 -4 -2
d)
((-1/2)x³+2x²+x-4):(x+1)=(-1/2)x²+(5/2)x-(3/2)
(1/2)x³ +(1/2)x²
-------------------------
= (5/2)x²+x
(-5/2)x²-(5/2)x
--------------------------
= -(3/2)x-4
(3/2)x+(3/2)
-----------------------
= -5/2
Sprawdzam
W(-1)=(1/2)+2-1-4=-5/2