Home > CALC > Chapter 7 > Lesson 7.3.3 > Problem 7-134
7-134.
Find the equation of a line tangent to the graph of
Use the tangent line to find an approximate value of
. Because
is hard to evaluate, the tangent line at will give a decent approximation of . Is your approximation an over or under estimate? Use the second derivative to justify your answer.
That will indicate if the tangent line is above or below the graph.