I was wondering if you could please help me. The problem is find all numbers for which the rational expression is undefined, (11/17w).I believe you multiply the top and bottom by 17w which would be (187w/17w^2) and square them.But I'm not sure is tht the correct answer? Thank you inadvance for your time.
No, you don't do that at all! You use the fact that
an expression is undefined when the denominator equals
to zero. So all you do is make the equation
The denominator of is , so we make
the equation
Divide both sides by 17
So the only number for which is
undefined is when w is .
You might ask, "What happens to the numerator, 11?"
You simply ignore the numerator because it is only
the denominator equaling zero that causes the expression
to be undefined.
Edwin