Find the tangent T and normal N lines to the curve at a fixed point: f(x) = 2x3 + x2+ 2x - 3, x0 = 1. Find general equations: Ax + By + C = 0, where all coefficients are integers, A > 0 and LCD(| A|, [ BI, ICI) = 1. Answers: T : X+ y+ =0; N : x+ y+ =0