1. Wielomian W(x)=a(x-3)(x+1)(x-7) dla argumentu ( - 2 ) przyjmuje wartość 20. Wyznacz wartość parametru a.
W(-2)=20
a(-2-3)(-2+1)(-2+7)=20
a(-5)(-1)5=20
a*25=20
a=⁴/₅
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W(-2)=20
a(-2-3)(-2+1)(-2+7)=20
a(-5)(-1)5=20
a*25=20
a=⁴/₅