Question

find all numbers for which the rational expression is undefinded

8/8z+7

I think the expression is undefined for all real numbers

Answer 1

If the fraction is 8/(8z) + 7 you are right.

If it is 8/(8z+7) then the answer is different.

Answer 2

Oops. If 8/(8z) + 7, then it is undefined only for z=0

In general, a rational expression is undefined where the denominator is zero.

Answer 3

Thank you steve

Answer 4

My pleasure. Now, go forth and solve similar problems with confidence!

Answer 5

I will try my best