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# Integration - The Basics Watch

1. I have no idea what you are doing

The power needs to increase from -2 to -1

You need to divide by the new power

Also, in order to reverse the chain rule you need to divide by 2

Edit .... I see what you are doing ... You can not just differentiate something in a denominator and get that in the denominator ... You should know how to differentiate (2x+1)^(-1)

You may find it easier to write the integrand as (2x+1)^(-2) at the start
2. (Original post by TenOfThem)
I have no idea what you are doing

The power needs to increase from -2 to -1

You need to divide by the new power

Also, in order to reverse the chain rule you need to divide by 2

Edit .... I see what you are doing ... You can not just differentiate something in a denominator and get that in the denominator ... You should know how to differentiate (2x+1)^(-1)

You may find it easier to write the integrand as (2x+1)^(-2) at the start
Thanks. I understand it now. I've just got one meow question regarding this: could I use ln to work this out?

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3. (Original post by TenOfThem)
I have no idea what you are doing

The power needs to increase from -2 to -1

You need to divide by the new power

Also, in order to reverse the chain rule you need to divide by 2

Edit .... I see what you are doing ... You can not just differentiate something in a denominator and get that in the denominator ... You should know how to differentiate (2x+1)^(-1)

You may find it easier to write the integrand as (2x+1)^(-2) at the start
In exams, would I be using the reverse chain rule more often than the given formulas for integration?

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4. (Original post by ps1265A)
Thanks. I understand it now. I've just got one meow question regarding this: could I use ln to work this out?

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No

(Original post by ps1265A)
In exams, would I be using the reverse chain rule more often than the given formulas for integration?

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No
5. (Original post by TenOfThem)
No

No
So I should start using the formulas from now?

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6. (Original post by ps1265A)
So I should start using the formulas from now?

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I am not sure what you are asking
7. (Original post by TenOfThem)
I am not sure what you are asking
You said that I would be using integration formulas (the standards) in exams compared to the reverse chain rule. So should I start using the formulas when I'm practicing questions?

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8. (Original post by ps1265A)
You said that I would be using integration formulas (the standards) in exams compared to the reverse chain rule. So should I start using the formulas when I'm practicing questions?

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You use whatever the question needs .... In the exam you will have 2-4 integrations.

You need to practice all of the methods.
9. (Original post by TenOfThem)
You use whatever the question needs .... In the exam you will have 2-4 integrations.

You need to practice all of the methods.
Alright thanks, I think my question was too general and in fact, I may have to use a combination of both

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Updated: January 18, 2015
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