October 2018 1 13 Report

Sprawdź, czy podana liczba r jest pierwiastkiem W.

a)r=2 W(x)= x^{2} - 6x + 8

b)r=3 W(x)= x^{3} + 3x^{2} - 12x -18

c)r=1 W(x)= x^{4} - x^{3} - 3x^{2} + 5x - 2

d)r=-2 W(x)= x^{5} + 4x^{4} + 4x^{3} + 7x^{2} - 28x - 28

e)r=0,5 W(x)= 12x^{3} + 8x^{2} - 3x - 2

f)r=-o,75 W(x)= 16x^{3} + 8x^{2} - 15x - 9


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