how to implement cartesian coordinates

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kash
kash 2013-3-29
I have a image
http://imgur.com/EOyLRe6
which consists of cartesian coordinates,plz tell how to implement these coordinates,which function must be used
Kindly help
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Walter Roberson
Walter Roberson 2013-3-29
Use the symbolic toolbox function diff()
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kash
kash 2013-4-3
after differentation we get 3x^2,so the answer should be 12 rite
Walter Roberson
Walter Roberson 2013-4-3
No, the answer for a=subs(f,[x],2) should be 8. Calculating diff(f) makes no difference to the value you find by substituting something into f.

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