![geg.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/213656/geg.png)
Find the equations of two tangent line
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Find the equations of two tangent lines at x=1 and x=2.
X3+2x2+1. How can I solve it in matlab Thanks
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darova
on 13 Apr 2019
y(x) = k(x-x0) + y0; % equation of a tangent line
% k=dy/dx - tangent of an angle
% [x0, y0] - coordinates of a point
As you can see you have all data to build your line except k. You can calculate it numerically (using diff() for example) or analytically (differentiate your function k = f'(x))
![geg.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/213656/geg.png)
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