Step 1. Given \( f(x) = x^3 + x^2 f'(1) + x f''(2) + f'''(3) \). Substitute \( f'(1) = -5 \), \( f''(2) = 2 \), \( f'''(3) = 6 \).
Step 2. Calculate \( f'(x) \):
\( f'(x) = 3x^2 + 2x f'(1) + f''(2) \)
Step 3. Evaluate \( f'(10) \):
\( f'(10) = 202 \)
The portion of the line \( 4x + 5y = 20 \) in the first quadrant is trisected by the lines \( L_1 \) and \( L_2 \) passing through the origin. The tangent of an angle between the lines \( L_1 \) and \( L_2 \) is: