Question

Which of the following situations best describes why excluding the value of a variable from the denominator of an algebraic fraction is necessary?
1)The value of the variable makes the numerator zero.
2)The value of the variable makes both the numerator and denominator zero.
3)The value of the variable makes the denominator zero.
4)The value of the variable makes the fraction equal to zero.

Answer 1

Division by zero is undefined in math.
You cannot divide by zero.
You can divide zero by a number (as long as it is not by zero.)
The numerator is what you are dividing.
The denominator is what you divide by.
The numerator can be zero.
The denominator cannot be zero.

The answer is 3).