Chapter 6.1, Problem 69E

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10th Edition

Ron Larson

ISBN: 9781305860919

Textbook Problem

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**Finding Present Value** In Exercises 67-72, find the present value of the income c (in dollars) over
*Examples 6 and 7.*

To determine

**To calculate:** The present value of the income *c* (in dollars) over *r*, given below as,

Explanation

**Given Information:**

The provided values are *c* is the income (in dollars), *r* is the inflation rate.

**Formula used:**

When *c* is the continuous income function in dollars per year at the inflation rate *r,* then the present value over the

Integration by parts.

When *u* and *v* is assumed to be the differentiable functions of *x* then,

**Calculation:**

Consider the values,

The income function would be given by,

So, apply the formula to calculate the present value.

Substitute

In order to solve the integral

Let

Apply integral on both sides of the above equation as,

Thus,

Then differentiate both sides of the equation

So,

Now apply integration by parts formula

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