mauk81
commented
11 years ago If you cancel n+5, you have to specify for n =/= -5, because it isn't visible anymore. You don't have to specify for n =/= -6 for n/(n+6), because it is still visible.
Open hunterws opened 11 years ago
mauk81
commented
11 years ago If you cancel n+5, you have to specify for n =/= -5, because it isn't visible anymore. You don't have to specify for n =/= -6 for n/(n+6), because it is still visible.
The problems asks to simplify y = (n^2+5n)/(n^2+11n+30) This simplifies to n/(n+6) and the question also requires the user to specify restrictions on the equation. The exercise's solution identifies the restriction as n not equal to -5 because we cancel a factor of n+5.
However, if n=-6 we should have a division by zero problem as well. So n should not be equal to -5 OR -6.
Thoughts?