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Tricky C3 Differentiation Maths Question Help Please! watch

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    I completed question a with no problems, b is what i'm stuck on.

    Since there will be y's and x'es in my equation, how can i solve it?

    i tried doing dx/dy and then flipping my answer over, but this made me get the wrong answer.

    Help or hints would be appreciated. thank you.
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    (Original post by ZiggyStardust_)
    Name:  !!!!!!!tsr.PNG
Views: 133
Size:  46.9 KB

    I completed question a with no problems, b is what i'm stuck on.

    Since there will be y's and x'es in my equation, how can i solve it?

    i tried doing dx/dy and then flipping my answer over, but this made me get the wrong answer.

    Help or hints would be appreciated. thank you.
    try subbing in your value for dy/dx and y=f(x) given in the question
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    (Original post by bruh2132)
    try subbing in your value for dy/dx and y=f(x) given in the question
    ye, i tried that just now but ended up with a quartic equation, when i should only be getting a quadratic.

    i must be going wrong somewhere?

    i subbed 5y as 5x(4x+1)^1/2
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    (Original post by bruh2132)
    try subbing in your value for dy/dx and y=f(x) given in the question
    LOL NVM. turns out i made a dumb mistake in my workings, i know how to get to the right answer. thanks for you quick response tho )
 
 
 
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Updated: September 25, 2017
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