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A function f(x) = 2x2 - 8x + 3 has a tangent parallel to the line 4x - 2y + 1 = 0 at point P. Find the equation of the tangent at P.

 

I don't know how they got the answer please help :)

Ashreeta  Aug 14, 2017
edited by Ashreeta  Aug 14, 2017
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Like so:

 

.

Alan  Aug 14, 2017

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