Determine all the zeros of $y(x)=x^{-3}$.
Antwoord 1 correct
Correct
Antwoord 2 optie
$x=0$
Antwoord 2 correct
Fout
Antwoord 3 optie
$x=3$
Antwoord 3 correct
Fout
Antwoord 4 optie
$x=-3$
Antwoord 4 correct
Fout
Antwoord 1 optie
$y(x)$ has no zeros.
Antwoord 1 feedback
Correct: A negative integer power function has no zeros.
Go on.
Antwoord 2 feedback
Wrong: $ is not part of the domain of this function.
Dee: Extra explanation.
Antwoord 3 feedback
Wrong: $y(3)=3^{-3}=\frac{1}{27}\neq0$.
See Extra explanation.
Antwoord 4 feedback
Wrong: $y(3)=3^{-3}=-\frac{1}{27}\neq0$.
See Extra explanation.