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# Define Bounded Area Formula

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Define A(x) to be the area bounded by the t-axis, the line y = 2t and a vertical line at t = x.
(a) Find a formula for A(x).
(b) Determine A'(x)

The figure below shows the graph of the derivative of a continuous function f .
(a) List the critical numbers of f .
(b) What values of x result in a local maximum?
(c) What values of x result in a local minimum?

Use information from the derivative of each function to help you graph the function. Find all local maximums and minimums of each function.

g(x)=2x^3-〖15x〗^2+6

In 4 and 5, a function and values of x so that f '(x) = 0 are given. Use the Second Derivative Test to determine whether each point (x, f (x)) is a local maximum, a local minimum or neither.
h(x)=x^4-8x^2-2; x=-2,0,2

f(x)=x∙In(x); x=1/e

Lest you have forgotten, the formulas you will need are as follows:
For a right circular cylinder of radius "r" and height "h":
The volume V = πr2h.
The surface area S = circular ends plus the cylindrical wall = 2πr2 + 2πrh.

You have been asked to design a one-liter (i.e., 1000 cm3) can shaped like a right circular cylinder (figure below). What dimensions will use the least material?

So the question is: What should "r" be and what should "h" be such that the volume is 1 liter but the surface area is least?

https://brainmass.com/math/functional-analysis/define-bounded-area-formula-614461

#### Solution Preview

1. Define A(x) to be the area bounded by the t-axis, the line y = 2t and a vertical line at t = x.
(a) Find a formula for A(x).
(b) Determine (x)

Solution:

(a)

(b)

2. The figure below shows the graph of the derivative of a continuous function f .
(a) List the critical numbers of f .
(b) What values of x result in a local maximum?
(c) What values of x result in a local minimum?

Solution:

(a)
Critical numbers are x = 2, 7

(b)
Function has local maximum at x = 7.

(c)
Function has local minimum at x = 2.

3. Use information from the derivative of each function to help you graph the function. Find all local maximums and minimums of each function.

Solution:

To find critical points, put g'(x) = 0

Critical points are x = 0, 5

Since g"(0) < 0 ...

#### Solution Summary

This posting provides step by step instructions to some questions on finding local maximum/minimum.

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