Is This Integral Calculation Correct?

  • Thread starter lemon26
  • Start date
In summary: or (5) \;\int \left(5 x^2 - \frac{4}{\sqrt{x^2}} \right)\, dx or (6) \;\int \left(5 x^2 - \frac{\sqrt{x}}{4} \right)\, dx or (7) \;\int \left(5 x^2 - \frac{4}{x} \right)\, dx or (8) \;\int \left(5 x^2 - \frac{\sqrt{x-4}}{x} \right)\, dx or (9) \;\int \left(5 x^2 - \frac
  • #1
lemon26
1
0
Hi, can anyone help please as I'm getting tied up in knots...

Homework Statement



Integrate (5x^2 + √x - 4/x^2) dx

Homework Equations



I think this is differentiating by parts...

The Attempt at a Solution



So far I've got to: 5x^3 / 3 + 2x^3/2 / 3 + 4 / x +c

I can't think how I can make it any tidier so any tips would be really appreciated!
 
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  • #2
Two questions for you:

(1) What is:
[tex]\int( f(x) + g(x)) dx[/tex]
(2) What is:
[tex]\int x^k dx[/tex]
 
  • #3
Question (3): What is 'differentiating by parts'?
 
  • #4
lemon26 said:
Hi, can anyone help please as I'm getting tied up in knots...

Homework Statement



Integrate (5x^2 + √x - 4/x^2) dx

Homework Equations



I think this is differentiating by parts...

The Attempt at a Solution



So far I've got to: 5x^3 / 3 + 2x^3/2 / 3 + 4 / x +c

I can't think how I can make it any tidier so any tips would be really appreciated!

Because you do not use parentheses, I cannot figure out whether you mean
[tex] (1) \; \int \left(5 x^2 + \sqrt{x} - \frac{4}{x^2} \right) \, dx \leftarrow \text{ what you wrote}[/tex]
or
[tex] (2) \; \int \left( 5 x^2 + \sqrt{x - \frac{4}{x^2}} \right) \, dx [/tex]
or
[tex] (3) \;\int \left(5 x^2 - \frac{ \sqrt{x-4}}{x^2} \right)\, dx [/tex]
or
[tex] (4) \;\int \left(5 x^2 - \sqrt{ \frac{x-4}{x^2} } \right)\, dx [/tex]
 

FAQ: Is This Integral Calculation Correct?

What is an integral?

An integral is a mathematical concept that represents the area under a curve in a graph. It is used to solve problems involving accumulation, such as finding the distance traveled by a moving object or the amount of water in a tank at a given time.

How do I find integrals?

There are several methods for finding integrals, including using the fundamental theorem of calculus, integration by substitution, and integration by parts. It is important to understand the problem and choose the appropriate method for solving it.

What is the difference between definite and indefinite integrals?

A definite integral has specific limits of integration, meaning it calculates the area under the curve within a certain range. An indefinite integral has no specified limits and represents a family of functions that differ by a constant.

Why do we use integrals in science?

Integrals are used in science to solve problems involving accumulation, such as calculating the volume of a solid or the work done by a force. They also have applications in physics, biology, and chemistry.

Can I use technology to find integrals?

Yes, there are various software programs and online tools that can help find integrals. However, it is important to understand the concepts and methods for finding integrals before relying solely on technology.

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