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Why is it very easy to conclude that011exdx converges without making any integration calculations?

Short Answer

Expert verified

The integral 1exis continuous on the interval 0,1. The function 1exhas no vertical asymptotes, so this is not improper integral. So, it is easy to conclude that given integral converges without making any integration calculations.

Step by step solution

01

Step 1. Given information

011exdx.

02

Step 2. The given integral converges.

The integral1exis continuous on the interval0,1.

The function 1exhas no vertical asymptotes, so this is not improper integral.

From the above information, it is easy to conclude that given integral converges without making any integration calculations.

03

Step 3. The graph of y=1ex is shown below:

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Most popular questions from this chapter

Solve each of the integrals in Exercises 39–74. Some integrals require trigonometric substitution, and some do not. Write your answers as algebraic functions whenever possible.

13-x2dx

Solvex4+x2dxthe following two ways:

(a) with the substitution u=4+x2;

(b) with the trigonometric substitution x = 2 tan u.

For each function u(x) in Exercises 9–12, write the differential du in terms of the differential dx.

u(x)=sinx

True/False: Determinewhethereachofthestatementsthat follow is true or false. If a statement is true, explain why. If a statement is false, provide a counterexample.

(a) True or False: f(x)=x+1x-1is a proper rational function.

(b) True or False: Every improper rational function can be expressed as the sum of a polynomial and a proper rational function.

(c) True or False: After polynomial long division of p(x) by q(x), the remainder r(x) has a degree strictly less than the degree of q(x).

(d) True or False: Polynomial long division can be used to divide two polynomials of the same degree.

(e) True or False: If a rational function is improper, then polynomial long division must be applied before using the method of partial fractions.

(f) True or False: The partial-fraction decomposition of x2+1x2(x-3)is of the form Ax2+Bx-3

(g) True or False: The partial-fraction decomposition of x2+1x2(x-3)is of the form Bx+Cx2+Ax-3.

(h) True or False: Every quadratic function can be written in the formA(x-k)2+C

Explain how to know when to use the trigonometric substitutions x=asinu,x=atanu,andx=asecu, Describe the trigonometric identity and the triangle that will be needed in each case. What are the possible values for xand uin each case?

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