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Which option is undefined because the denominator is zero?

Answer and explanation

Correct answer: ( \frac{4}{0} )

The direct answer is D, \\(\frac{4}{0}\\). A fraction is defined only when its denominator is not zero, because division asks how many times the denominator fits into the numerator, and division by zero has no defined value. Check the options carefully. In A, \\(\frac{8}{2}\\) has denominator 2, so it is defined and equals 4. In B, \\(\frac{0}{6}\\) has denominator 6, so it is defined and equals 0. In C, \\(\frac{-3}{7}\\) has denominator 7, so it is defined, even though its value is negative. In D, the denominator is 0, so \\(\frac{4}{0}\\) is undefined; it cannot be treated as an ordinary rational number. Thus D is correct. Remember: a rational number has the form \\(\frac{p}{q}\\) with integers p and q and the condition \\(q\ne0\\).

Related tags

Rational NumbersClass 9Denominator

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