25-32 Explain, using Theorems 4, 5, 7, and 9, why the function is continuous at every number in its domain. State the domain. 2x2x1 25. F(x) = = 26. G(x) = x + 1 x-2 27. Q(x) = 28. R(t) = x- 2 29. A(t) = arcsin(1 + 2t) 30. B(x) = 1 31. M(x) = 1+ X x + 1 2x2-x-1 e sin t 2 + cos t tan x 4-x2 32. N(r) = tan (1 + er) tan(1 e) 2 X - X 20. f(x) = x - 1 1 if x 1 thrif if x = 1 a = 1 COS X if x < 0 a = 0 21. ((x) = 0 if x = 0 1-x if x>0