Posted by **CHRIS** on Friday, December 30, 2011 at 10:41am.

For which value of x will the fraction 7/2x-6 be undefined?

HOW TO DO THIS ?

- MATH -
**Reiny**, Friday, December 30, 2011 at 10:44am
A fraction is undefined if its denominator is zero, so set

2x-6 = 0

2x=6

x = 3

So x = 3 makes the fraction undefined.

- MATH -
**Todd**, Friday, December 30, 2011 at 10:46am
Any fraction is undefined when the denominator is equal to zero.

In this problem the denominator is 2x-6.

In order to find what value of x is needed to make the denominator zero, set it equal to x and solve.

2x-6=o

2x=6

x=3

Therefore, this fraction is undefined (or has a denominator of zero) when x is equal to 3.

- MATH -
**LISa**, Friday, December 30, 2011 at 10:47am
thanks

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