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Posted by Anonymous on Wednesday, January 30, 2013 at 3:34pm.
Given f(x)=x+sqrt(x) calculate the tangent line at the point (9,12) y=___?__(x-9)+12
you have a point: (9,12) and a slope: y'(9) = 7/6 so the line is y-12 = 7/6 (x-9)
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