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April 24, 2026, 11:05:14 pm
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Author Topic: Can u 3(u+4)^5 u substitute in methods?  (Read 952 times)  Share 

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TheAspiringDoc

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Can u 3(u+4)^5 u substitute in methods?
« on: February 26, 2018, 09:20:28 pm »
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Can you use u-substitution in Methods for differentiation with the chain rule?
While I'm at it: is there anything (else?) in specialist that you're not allowed to use in methods?

Thanks!
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jazzycab

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Re: Can u 3(u+4)^5 u substitute in methods?
« Reply #1 on: February 27, 2018, 04:28:29 am »
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Quote from: TheAspiringDoc on February 26, 2018, 09:20:28 pm
Can you use u-substitution in Methods for differentiation with the chain rule?
While I'm at it: is there anything (else?) in specialist that you're not allowed to use in methods?

Thanks!

Any correct mathematics is permissible, whether it's in the course or not
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Sine

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Re: Can u 3(u+4)^5 u substitute in methods?
« Reply #2 on: February 27, 2018, 07:28:53 am »
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I wouldn't but thats just me - you will never need to use it and marking for questions with multiple marks (especially the method marks) gets a little hazy once you start doing stuff thats not on the course so it'll all depemdend on which assesor you get.
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Bri MT

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Re: Can u 3(u+4)^5 u substitute in methods?
« Reply #3 on: February 27, 2018, 08:19:08 am »
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You're allowed to use valid maths that isn't on the course but if you get the wrong answer you might not get working marks and sometimes questions will directly ("apply/using [technique]") or indirectly ("hence") specify the method
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