How do you find the domain for $f(x)=9/x$ ?

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Answer 1 · 2016-09-25T07:11:14

$"The Domain of "f = RR-{0)$ .

As per the Defn. of $f$ , we are supposed to to divide the no $9$ by

a variable no. $x$ .

Since, we can not divide by the no. $0$ , we must have, $xne0$ .

In other words, this means that to make $f$ mathematically

meaningful , we can assign to $x$ any value from the Set RR,

except , the no. $0$ .

Such a Set becomes the Domain of a given Function, so,

$"The Domain of "f = RR-{0)$ .

How do you find the domain for f(x)=9/xf(x)=9/x?