Excercises number 5 Only

1. Which of the following integrals is a candidate for the Substitution Method? a ) 5x4 sin(x ) dx (b) sin x cosx dx x sin x dx 2. Find an appropriate choice of u for evaluating the following inte- grals by substitution: Exercises In Exercises 1-6, calculate du. 1. u = x3- x2 2. u = 2x4+ 8x 3. u = cos(x2) 4. u = tan x 5. u = sin+ 0 6. u = 1+1 In Exercises 7-22, write the integral in terms of u and du. Then eval- uate. 7. ( x - 7)3 dx, u =x-7 8. (x + 25 ) -2 dx, u = x+ 25