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There could be a variable in the numerator which is not defined. For example, [tan(x)]/3 has no variable in the denominator but the expression is not defined for x = pi/2, for example (90 deg).

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How do you find the excluded values of variables?

you put the fraction in simplest form (the numerator and denominator have no common factors besides one) then you find what number your variable should be to make the denominator 0. this is excluded value b/c your denominator can never equal 0 the number you found is your excluded value ex. 4 ------ Your excluded value is 3 because 3(3-3)=0 x(x-3)


Explain how to find restrictions on the variable in a rational equation?

Substitute the variable in the denominator for a value that will make the denominator have a value of 0 or an imaginary number


How do you Find excluded values?

To find excluded values in a mathematical expression, especially in rational functions, identify values that make the denominator zero, as these values are undefined. Set the denominator equal to zero and solve for the variable to determine these excluded values. Additionally, for other types of functions, like square roots, identify values that lead to negative results under the square root. Always remember to consider the context of the problem to ensure all excluded values are accounted for.


How do you find the denominator of a fraction if you know the numerator and the value?

Denominator = Numerator/Value


What is it called when you have to set the denominator equal to 0 so you can find what the soultion can not be?

you are finding values to be excluded from the domain.


How do you solve rational expressions?

To solve rational expressions, first, factor both the numerator and the denominator whenever possible. Next, identify any common factors that can be canceled out to simplify the expression. If the expression includes an equation, set the simplified form equal to zero to find the variable's value, and ensure to check for any excluded values that make the denominator zero. Finally, express the solution in its simplest form.


How do you find the value of a variable in similar figures?

the figures are similar. Find the value of each variable. solve


What is the result of substituting a value for a variable in a function?

To find the value of the other variable


How do you find the value of a variable of a trapezoid?

The answer will depend on what aspect is the variable.


How find the excluded value of x for a polynomial expression?

Use factorials.


How do you find the value of an algebraic expression?

Take the value of each variable in the expression and replace the variable by its value. Then do the math!


What is a characteristics of a dependent variable?

The variable that depens on a number or anther variable to find it's value.