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    Dear Math genius,

    I am having problems with this question
    please help me
    How do i find part b

    My answer was
     

f'(x)=\left\{\begin{matrix}

y = \frac{1}{x}, &  x \neq 0\\ 

y = \frac{3}{2}+ \sqrt{\frac{5}{4}-x}, & x\geq  1\\ 

 y = 3 - x & x \geq 0

\end{matrix}\right.

    Please help me as I think my answer is wrong Name:  extension question.jpg
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Size:  372.5 KBName:  extension question.jpg
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Size:  372.5 KB

    Thank you for helping
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    I'm not sure what you've done. To find f'(x), you differentiate each function in their respective ranges. Also note, there is no need to write y =... in your answers. It might be a good idea to draw out the function to get to a sense of what is happening.
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    (Original post by NeverLucky)
    I'm not sure what you've done. To find f'(x), you differentiate each function in their respective ranges. Also note, there is no need to write y =... in your answers. It might be a good idea to draw out the function to get to a sense of what is happening.
    I managed to do it but i want to know if there is something special about the results i am suppose to know This is becausei t is an extension exercise and thought that if i did it i will learn in depth stuff about functions
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    (Original post by bigmansouf)
    I managed to do it but i want to know if there is something special about the results i am suppose to know This is becausei t is an extension exercise and thought that if i did it i will learn in depth stuff about functions
    I don't think there's really much to gather from doing that question tbh other than maybe it's a continuous function between the domain values. C3 Functions isn't one of the major topics in C3 really - a lot of it is pretty straightforward.
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    "I think my answer is wrong" - well why don't you show it to us then...?
 
 
 
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