homework: ("IT it is discontinuous, be sure to describe the discontinuity) In Exercises 1-10, determine whether the function is continuous on the entire real line. Explain your reasoning. 1 . f ( x ) = 5x3 -- x 2 + 2 2. f( x ) = (x2 -- 1)3 13 . f(x ) = * - 1 x +1 14 . f(x ) = 1 - 8 3. f(x) =- x - 2 4. f ( x ) = 9 - x 2 5. f ( x) = 4+ x2 6. f(x) = 3x x2 + 1 7. f ( x ) = 2x - 1 12 - 8x + 15 8. f( x) = *+ 4 - 3- 2 -1 123 x 2 am 6.x + 5 2 9. 8 (x) = * - 4x + 4 -6 -2 2 * 2 - 4 15 . f ( x ) = x2 - 2x + 1 10./ 8(x) =* 9x + 20 16. f(x) = 3 -2x - x2 X2 - 16 In Exercises 11-34, describe the interval(s) on which the function 17. f(x ) = x2 - 1 is continuous. 18. f(x) = * - 3 12 - 9 11. f(x) = 12. f ( x ) = 2 - 4 19. f(x ) = 12+ 1 20. f(x) = 2 x - 5 21. f (x ) = = x2 - 9x + 20 x - 1 - 3 23 - 1 22. ) f ( x ) = = x2+x -2 -3- 2 - 1 -2 - -3 1 .)