1. Evaluate each of the following integrals using the indicated technique. (Additional tech- niques may also be required.) dx, trigonometric integration strategies (a) [ 2x²-4x-1 dx, partial fractions 3x3x2+3x+1 cos (3x) (b) sin(3x) (c) S 2√2 (d) x²-25 23 I da, trigonometric substitution √16-x² da, trigonometric substitution 2. Evaluate the improper integral or show that it is divergent. L² x²e4 dx

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