anonymous
  • anonymous
How would I solve this?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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campbell_st
  • campbell_st
start by rewriting the function in index form \[f(x) = \frac{-9}{x}~~~~or~~~~~f(x) = -9x^{-1}\] now you can find the derivative when you get the derivative just substitute x =12 and calculate an answer
campbell_st
  • campbell_st
or if you wait someone always gives the answer

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anonymous
  • anonymous
Thanks.
anonymous
  • anonymous
Well how do I find the derivative, I'm not familiar with the process.
anonymous
  • anonymous
@campbell_st
campbell_st
  • campbell_st
ok... well if you don't understand the process of differentiation, then it's extremely difficult to complete this question. so have you studied any calculus..?
anonymous
  • anonymous
I do not understand differentiation that well, as I am self taught.
campbell_st
  • campbell_st
ok, well here are some good online notes that take you through the process and methods but the basic thing for your question, now it's rewritten is to use this if \[f(x) = ax^n\] then the derivative is \[f'(x) = n \times ax^{n -1}\] here are the notes http://tutorial.math.lamar.edu/Classes/CalcI/DerivativeIntro.aspx hope they help
anonymous
  • anonymous
Thanks, you've been very helpful.
anonymous
  • anonymous
@campbell_st
anonymous
  • anonymous
I think it is 1/16 is that correct?
campbell_st
  • campbell_st
that's correct
anonymous
  • anonymous
Thanks :)

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