3x2 + 4x + 1 -dx 3x3 + 6x2 + 3x + 50 9x2+12x+3 + C (3x3+6x²+3x+5) A x3+2x2+x - + C x4+2x3+x2+5x B) 3 In|3x3 + 6x² + 3x + 5| + C D In 3x + 6x? + 3x + 5| + C ||

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