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Question: how can i make diff and implicit diff with Set Point answer?

Question:how can i make diff and implicit diff with Set Point answer?

mohammad2232 25 Maple
diff implicit
December 11 2013
2

hello 

please say me how can i make diff and implicit diff with Set Point answer?

for example how can i write these?

(x^2+y^2=6)' => 2*x+2*y*y'=0 => y'(-2,5)=2/5

or

(y=x^3+4*x)' => y'=3*x^2+4 => y'(3)=31

thanks very much
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