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Question: Newbie Help - First Year University (Derivative)

Question:Newbie Help - First Year University (Derivative)

Voltageist 15
student
September 20 2014
1

f(x) :=(x^(12)-x*sin(x^(11)))/(x^(34))+e^(sqrt(x+4))*ln(abs((cos(x)^(5))-6))

diff(f(x), x$2)

 

What would I need to type in if I would want to find f^-2(5)? I've tried this;

diff(f(5), x$2)

But it keeps giving me zero... Thanks in advance! :)

 
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