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Student Support Forum: 'Derivative and valutation of a function' topicStudent Support Forum > General > "Derivative and valutation of a function"

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jf
12/13/12 12:19pm

On the reference page for D, look in the "See Also" section at the bottom.

In[1]:= ?Derivative
f' represents the derivative of a function f of one argument.
Derivative[n1, n2, ..][f] is the general form, representing a function obtained
from f by differentiating n1 times with respect to the first argument, n2
times with respect to the second argument, and so on.

A one-argument function. Take first derivative and evaluate at x=2.2.

In[2]:= f[x_]:= Sin[x]/x

In[3]:= f'[2.2]
Out[3]= -0.434545

A two-argument function. Take first derivative with respect to the second argument then evaluate at {3, 2.7}.

In[4]:= Derivative[0,1][BesselJ][3,2.7]
Out[4]= 0.187289


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Subject (listing for 'Derivative and valutation of a function')
Author Date Posted
Derivative and valutation of a function andrea 12/12/12 3:38pm
Re: Derivative and valutation of a function Nasser M. Ab... 12/13/12 11:44am
Re: Re: Derivative and valutation of a function andrea 12/13/12 12:20pm
Re: Derivative and valutation of a function jf 12/13/12 12:19pm
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