Home > APCALC > Chapter 5 > Lesson 5.5.1 > Problem 5-155
5-155.
Let
Write the equation of the line tangent to
. Use the slope, which is
, and the point to write the equation. Use your tangent line to approximate
. Is the approximation an overestimate or an underestimate of the actual value?
If
is concave up at , then the approximation is an underestimate.