Integral Solution for 2/√x3 + 3√x | Homework Help

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In summary, the conversation discusses how to solve the integral ∫ (2/√x3 + 3√x) dx using the equation Xndx = xn+1/n+1 +C. The person asks for confirmation on their answer and is advised to try the Wolfram integrator or to check their answer by differentiating it. They are also reminded to trust in their own abilities.
  • #1
lubo
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Homework Statement



∫ (2/√x3 + 3√x) dx


Homework Equations



Xndx = xn+1/n+1 +C

The Attempt at a Solution



∫(2/(x3)^1/2 + 3x1/2) dx

∫(2/x3/2+ 3x1/2) dx

∫(2x-3/2+ 3x1/2) dx

= 2x-1/2/-1/2 + 3x3/2/(3/2) +C

= -4x-1/2 + 2x3/2 +C

= -4/x1/2 + 2x3/2 +C

Can you please confirm the above answer as I have no answers to compare and am not 100% sure on this one?

Thank you for any help in advance :smile:
 
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  • #2
Try the Wolfram integrator.

What you really really need is some way of being able to check your integrals without having to refer to some authority like this. You start by seeing if you can describe what it is about the answer that makes you unsure of it. Is it something to do with the conversion of surds to fractional powers? The use of negative powers? Or just the rule for integrating a power?

Having identified the problem, you can work out how to test it.
 
  • #3
Thanks. The program above worked. I have a new calculator and it is showing me the wrong result and with no answer? This program solved it easy.
 
  • #4
You really didn't need a calculator to check your answer.

You can check your answer by differentiating it to see if you get back the original. In your case, it works.

Trust in the force, Luke.
 
  • #5
Jedishrfu - Now that is cool also, I did forget about this as it is a long time since I was taught it. Thanks.
 

What is an integral?

An integral is a mathematical concept that represents the area under a curve in a graph. It is also known as the antiderivative or the primitive function.

Why is it important to determine the integral?

Determining the integral is important because it allows us to find the total amount of a quantity, such as distance or volume, from a given rate of change. It also helps in solving various real-world problems in physics, economics, and other fields.

How do you determine the integral?

The process of determining the integral is called integration. It involves finding the antiderivative of a function, which is the original function before taking the derivative. Integration can be done using various techniques such as substitution, integration by parts, and partial fractions.

What is the difference between definite and indefinite integrals?

A definite integral has specific upper and lower limits and gives a numerical value, while an indefinite integral does not have limits and gives an equation with a constant term. Definite integrals are used to find the total amount of a quantity, while indefinite integrals are used to find the general solution to a differential equation.

What are some common applications of determining integrals?

Determining integrals has various applications in different fields such as physics, engineering, economics, and statistics. It is used to find the area under a curve, the volume of a solid, the work done by a variable force, the velocity of an object, and the probability of an event. It is also used in optimization problems to find the maximum or minimum value of a function.

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