HSC Stuff > HSC Mathematics Extension 1

Implicit Differentiation

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frog1944:
Hi,

In 3 Unit am I allowed to use implicit differentiation? I'm aware for the questions they can obviously be done without implicit differentiation (as this is not explicitly taught here), however I find that in some related rates of change questions it can be easier to do using implicit differentiation.

Thanks

RuiAce:
You're certainly right in that occasionally some are easier with implicit differentiation.

This is another thing that gets debated. That being said, this is a scenario where most teachers would be for it and accept its usage. Implicit differentiation sometimes helps with integration by substitution as well.

jamonwindeyer:

--- Quote from: RuiAce on May 28, 2017, 11:10:54 am ---You're certainly right in that occasionally some are easier with implicit differentiation.

This is another thing that gets debated. That being said, this is a scenario where most teachers would be for it and accept its usage. Implicit differentiation sometimes helps with integration by substitution as well.

--- End quote ---

Would it be correct to say that you might lose marks for working if your answer is incorrect? That would be my guess at least ;D

jakesilove:

--- Quote from: jamonwindeyer on May 28, 2017, 06:58:59 pm ---Would it be correct to say that you might lose marks for working if your answer is incorrect? That would be my guess at least ;D

--- End quote ---

100%

If your final answer is wrong, and you used a method outside of the 3U curriculum, you are likely to lose marks. Balance that against the fact that implicit calculus might be quicker/save you time. It's your call at the end of the day!

RuiAce:
Yeah, I'd agree.

Different teachers have different scales of leniency though

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