The problem
Click to see the original problem
Hello? I keep getting wrong answer in this type of questions, so for example the answer here is 1/u-7 but the correct answer is just u=7
Answer provided by our tutors
If the question is:
Find all excluded values for the expression.
Find all values of x for which the expression is undefined.
Then you need to put the denominator equaled to zero into the solver and solve for 'x':
And you will get the correct answer.
Click here to see the solution.