2/0 2x x +∫ (Put x + 2 = t2) 5. 2 sin 1 cos x dx x π +∫ 6. 20 4 - dx x x+∫ 7. 21 2 5 dx x x− + +∫ 8. 2 2 1 1- xe dxx x     ∫ Choose the correct answer in Exercises 9 and 10.

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| Exercise 7.9

Question 4

2/0 2x x +\int (Put x + 2 = t2) 5. 2 sin 1 cos x dx x π +\int 6. 20 4 - dx x x+\int 7. 21 2 5 dx x x- + +\int 8. 2 2 1 1- xe dxx x     \int Choose the correct answer in Exercises 9 and 10.

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