Q: If a fraction in the denominator it is undefined IT HAS WHAT its denominate?

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If the denominator is 0.

If the denominator is 0.

The answer depends on the part of the question that is missing.

If the denominator has a zero value.

When it is 0.

If denominator = 0.

If the denominator is 0 then the fraction is undefined.

when the denominator is zero example: 5/0

0. Whatever the denominator - unless the denominator is also 0 in which case the fraction is undefined.

no because then it would be undefined

A fraction such that the divisor (denominator) is zero is undefined. Such a division is expressed as x/0 where x is the dividend (numerator). In ordinary arithmetic, the expression has no meaning so division by zero is undefined.

The fraction reduces to 1 - UNLESS they are both zero, in which case the fraction is undefined.

Well, any fraction with a zero in the denominator is undefined, and that's sometimes considered infinity.

The answer would be "undefined" as there is no way to divide a number by zero (0).

A quotient in which the numerator or denominator are undefined will be undefined. For example p/q is an undefined quotient until you know something about p and q. Also, if the denominator is zero, the division is undefined.

If they are both zero, the the fraction is undefined. Otherwise it means that the ratio is equal to one.

It isn't clear what, exactly, you want to achieve. To write a fraction in standard form, it is customary to leave no radical in the denominator; in this case, for example, if you have square root of 2 in the denominator, you would multiply top and bottom by square root of 2, precisely to get rid of the radical in the denominator.

A rational number is any number that can be expressed as a fraction. It becomes meaningless or undefined when the lower number, the denominator, its 0 (zero)

That is correct.

YES a fraction can be a denominator.

A zero. Zero in the denominator make the expression undefined for algebraic purposes.

Undefined.

a rational expression is undefined when the denominator is 0 because we cannot dvide by 0.

The world as we know it ceases to exist as the space-time continuum folds in on itself. Or Nothing happens. Division by zero is undefined. Any fraction with zero as a denominator is meaningless.

Undefined slope is a vertical line along the horizontal point of origin., the slope would have a denominator of zero, which is undefined.