integration question Watch

BonBon2
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#1
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#1
If you integrate 3/(1+4x)^1/2 using the quotient rule
i get a value of -6/(1+4x)^3/2 and using a dervative calculator online i get a value which is the same but the integral is apparently 3/2 * (1+4x)^1/2
i don't get what im doing wrong the method in the mark scheme used a different approach to integrate but i should get the same answer regardless right ??
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mohamadjamil03
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#2
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#2
I've just tried integrating this using the typical reverse chain rule method and I seem to get the same answer as the mark scheme. Do you mind posting your working out here?
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nabsers
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#3
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Hey!
I reckon it'd be easier to help if you showed us your working so we could see where you went wrong.
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BonBon2
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#4
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(Original post by mohamadjamil03)
I've just tried integrating this using the typical reverse chain rule method and I seem to get the same answer as the mark scheme. Do you mind posting your working out here?
sure i'll try to but can you try to integrate using the quotient rule please?
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mohamadjamil03
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#5
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I think I see the problem. The quotient rule is used for differentiating quotients, but here, you should be integrating. I just differentiated the question and got the answer that you put in the original post.
(Original post by BonBon2)
sure i'll try to but can you try to integrate using the quotient rule please?
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BonBon2
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#6
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(Original post by mohamadjamil03)
I think I see the problem. The quotient rule is used for differentiating quotients, but here, you should be integrating. I just differentiated the question and got the answer that you put in the original post.
i see what i did wrong cheers man
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mohamadjamil03
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#7
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No problem
(Original post by BonBon2)
i see what i did wrong cheers man
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