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# AQA FP3 Past Paper question watch

1. I just don't get question 3 in the paper here

http://filestore.aqa.org.uk/subjects...W-QP-JAN06.PDF

I can do part a) and I've done the implicit differentiation but why is C/(x^2 -1) a solution. The mark scheme just says implies but I don't know why.

Mark scheme
http://filestore.aqa.org.uk/subjects...W-MS-JAN06.PDF
2. (Original post by maggiehodgson)
I just don't get question 3 in the paper here

http://filestore.aqa.org.uk/subjects...W-QP-JAN06.PDF

I can do part a) and I've done the implicit differentiation but why is C/(x^2 -1) a solution. The mark scheme just says implies but I don't know why.

Mark scheme
http://filestore.aqa.org.uk/subjects...W-MS-JAN06.PDF
is a solution of because it satisfies the differential equation.

3. (Original post by BuryMathsTutor)
is a solution of because it satisfies the differential equation.

Thanks. Easy now I've been shown!

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