Question: For y = f ( x ) = x + x , find the equations of the tangent or normal lines at x = 4

For y=f(x)=x+x, find the equations of the tangent or normal lines at x=4. Find the equation of the tangent line and express it in the standard form ax+by+c=0 when a,b, and c are integers, a is positive, and no common factor among a,b, and c other than 1

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