p12_17.dir

Programs for the book Advanced Engineering Mathematics using MATLAB, 2ndEd.

% partial derivative
>>df=((1.1)^3-(.9)^3)
df =

    0.6020

>>dfx=df/.2
dfx =

    3.0100

>>% Reduce stepsize
>>df=((1.01)^3-(.99)^3)
df =

    0.0600

>>dfx=df/.02
dfx =

    3.0001

>>exit
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