Asked by emi
what is the domain for f(x)= 1 / (x^3-4x)?
Thanks!
Thanks!
Answers
Answered by
MathMate
Factorize the denominator to get
f(x)=1/(x(x-2)(x+2))
Realizing that the domain of a rational function is ℝ <i>minus</i> the values of x which makes the denominator zero.
In this case, the domain of f(x) is ℝ less three points. Can you spot them?
f(x)=1/(x(x-2)(x+2))
Realizing that the domain of a rational function is ℝ <i>minus</i> the values of x which makes the denominator zero.
In this case, the domain of f(x) is ℝ less three points. Can you spot them?
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