# 009A Sample Final 1

**This is a sample, and is meant to represent the material usually covered in Math 9A for the final. An actual test may or may not be similar. Click on the** ** boxed problem numbers to go to a solution.**

## Problem 1

In each part, compute the limit. If the limit is infinite, be sure to specify positive or negative infinity.

- a)

- b)

- c)

## Problem 2

Consider the following piecewise defined function:

- a) Show that is continuous at .

- b) Using the limit definition of the derivative, and computing the limits from both sides, show that is differentiable at .

## Problem 3

Find the derivatives of the following functions.

- a)

- b)

## Problem 4

If

compute and find the equation for the tangent line at . You may leave your answers in point-slope form.

## Problem 5

A kite 30 (meters) above the ground moves horizontally at a speed of 6 (m/s). At what rate is the length of the string increasing when 50 (meters) of the string has been let out?

## Problem 6

Consider the following function:

- a) Use the Intermediate Value Theorem to show that has at least one zero.

- b) Use the Mean Value Theorem to show that has at most one zero.

## Problem 7

A curve is defined implicitly by the equation

a) Using implicit differentiation, compute .

b) Find an equation of the tangent line to the curve at the point .

## Problem 8

Let

a) Find the differential of at .

b) Use differentials to find an approximate value for .

## Problem 9

Given the function ,

a) Find the intervals in which the function increases or decreases.

b) Find the local maximum and local minimum values.

c) Find the intervals in which the function concaves upward or concaves downward.

d) Find the inflection point(s).

e) Use the above information (a) to (d) to sketch the graph of .

## Problem 10

Consider the following continuous function:

defined on the closed, bounded interval .

a) Find all the critical points for .

b) Determine the absolute maximum and absolute minimum values for on the interval .

**Contributions to this page were made by Kayla Murray**