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    Name:  ImageUploadedByStudent Room1445945722.460837.jpg
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Size:  132.6 KBQuestion 2g????


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


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    (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?
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    How did you do it ????


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


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


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


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    (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!
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    Yeah you are right 💯


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    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
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    (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 :woo:
 
 
 
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