Find the equations of two tangent line

Find the equations of two tangent lines at x=1 and x=2.

X3+2x2+1. How can I solve it in matlab Thanks

Answer 1

[darova]

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))

[darova]

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