Tangent lines and parallel lines

Questions (2)

For what values of x is the tangent line of the graph off(x)=8x3+36x2+46x−72 parallel to the line y=−2x+1.9 ? Enter the x
1. 3 answers
2. asked by Allison
3. 1,973 views
If f(x)=[x−1/(1+5 x)], there are two points on the graph ofy=f(x) at which the tangent lines are parallel to the line
1. 3 answers
2. asked by Jack
3. 430 views