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Mathematics 15 Online
OpenStudy (anonymous):

find the equation of the line tangent to the graph of x^2+y^2=25 a the point (4,3) find the equation of the line normal to the graph of 4y^2-xy=3 at the point (-1,-1). if f(2)=3 and f'(2)=-1 find an equation of the tangent line when x=2.

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