Please answer 17 and 18

Limits of Rational Functions In Exercises 13-22, find the limit of each rational function (a) as 47. 1 x - oo and (b) as x - -co. 213 +.7 Find 13. f(x) = 2r + 3 5x + 7 14. f(x) = 3-2+x+7 49. 3x + 7 15. f(x) 12 + 3 16. f(x) - 2 - 2 51. 7x 9x4 + x 17. h(x) = 18. h(x) = Find 13 - 312 + 6.1 214 + 5x2 - x+6 53. li 19. g(x) =10x + x + 31 20. 8(x) =X' + 7x2 - 2 2-x+1 a. 21. Ax) = 3x7 + 5x2 - 1 -51- 2+3 + 9 C. 22. h(x) = 613 - 7x + 3 3+1-4x