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# I am getting different answer to the book. Help Plz watch

1. Question 2g????

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2. Actually I meant question 2c???? I keep getting 4 ???

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3. (Original post by Massli100)
Actually I meant question 2c???? I keep getting 4 ???

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I get 4/3. Is that the answer?
4. How did you do it ????

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5. (Original post by rock_climber86)
I get 4/3. Is that the answer?
How did you do it ??

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6. (Original post by Massli100)
How did you do it ??

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well,differentiating the function implicitly you get: 1 = dy/dx - 0.5*y^-0.5*dy/dx. Then you just stick in 4, factorise and rearrange. Was the answer correct?
7. (Original post by Massli100)
How did you do it ??

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Post your working so we can help.
8. Thank you guys 💯💯

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9. (Original post by Massli100)
Thank you guys 💯💯

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Do let me know the correct answer when you get a sec. I just want to know for my own sanity whether what I posted earlier is correct or not. It's been about 10 years since i've done any a-level maths!
10. Yeah you are right 💯

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11. you need to do a product rule to find dx/dy

then put y = -2

then get dy/dx using the reciprocal of dx/dy
12. (Original post by Massli100)
Yeah you are right 💯

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coolies, I still got the skills, despite not having done this **** in donkeys years

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Updated: October 31, 2015
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