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1. Liczby -1 oraz 1 są miejsami zerowymi funkcji.
A.f(x)= xkwadrat-1/xkwadrat+2x+1
B.F(X)=3xkwadrat - 3/ x-1
C.f(x)=(xkwadrat +1)(x-1)
D.f(x)= \frac{1}{5} x^{2} - \frac{1}{5}
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