Evaluate the integrals in Exercises 1–14. dx 3 dx 1. V9 + x² 2. V1 + 9x² dx dx 3. 4. 4 + x² 8 + 2x2 r1/2V7 6. •3/2 dx 2 dx 5. V9 – x² Vi – 4x2 V25 – 1² dt V1 – 9t² dt 7. 8. 5 dx V 25x2 dx 3 9. 10. V4x? 5 49 9. y² 49 dy, y > 7 25 dy, y > 5 11. 12. 2 dx dx 13. x²Vx² x > 1 x > 1 14. x³Vx -

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