Find all numbers for which the rational expression is undefined:

-24/25v

To determine the values for which the rational expression -24/25v is undefined, we need to identify the values of v that would make the denominator of the expression equal to zero.

Since the denominator is 25v, we set it equal to zero and solve for v:

25v = 0

Dividing both sides of the equation by 25:

v = 0

Therefore, the rational expression -24/25v is undefined at v = 0, as dividing by zero is not allowed in mathematics.

Hence, the number 0 is the value for which the rational expression is undefined.