SOLUTION: List all numbers for which the rational expression is undefined 4/b+7 I am not sure but I think 7 is the anwser. Could you please show me how to do this problem.

Question 315837: List all numbers for which the rational expression is undefined
4/b+7
I am not sure but I think 7 is the anwser. Could you please show me how to do this problem.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If the rational expression is , then...

First take the denominator and set it equal to zero to get . We're doing this because we want to find the values of 'b' that make the denominator zero (remember, we can't divide by zero).

Solve to get . So the value makes the rational expression undefined.
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