Question 622828
<ul><li>First, don't post so many problems in a single post. You are unlikely to get help when you do.</li><li>Tutors are more likely to help with clearly posted problems. For example, put parentheses around numerators and denominators. Your problem #1, as posted, means:
{{{f(x)= x-1/x-4}}}
But I suspect that it is rather
{{{f(x)= x-1/(x-4)}}}
or
{{{f(x)= (x-1)/x-4}}}
or
{{{f(x)= (x-1)/(x-4)}}}
Most of the problems you posted suffer from this ambiguity. Tutors are unlikely to respond when they are not sure what the problem actually is. (Note: Click on the "Show Source" link above to see what I typed for each of the expressions above.)</li></ul>