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Determine which of the value(s), if any, must be excluded from the domain of the variable in the expression x^2/x^2+25Options:x=3,x=5,x=0,x=-5None

1 Answer

3 votes

Given:

The expression is,


(x^2)/(x^2+25)

The domain of the function is values of independent variable for which expression is defined. Since expression is not defined when,


x^2+25=0

Sinece there is no real value of x for which denominator of expression,


x^2+25

is zero. So domain of the expression is,


(-\infty,\infty)

So all values of x is included in the domain of the function. Thus answer is None.

User Esgaldir
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