gaokao 2018 Q13

gaokao · China · national-II-science 5 marks Tangents, normals and gradients Find tangent line equation at a given point
The equation of the tangent line to the curve $y = 2 \ln ( x + 1 )$ at the point $( 0,0 )$ is $\_\_\_\_$.
The equation of the tangent line to the curve $y = 2 \ln ( x + 1 )$ at the point $( 0,0 )$ is $\_\_\_\_$.