Question 4 using scratch and proof and question 3 using cut points

1. If f(x) = 1.4x2 5x + 2.3, determine f '(x) using the definition of derivative. 2. Determine if the following limits exist and if they do, evaluate them. . vTB (a) 11.135 2x 13 . * 2x __ 7, x 510 0\" 331110\") Where x) _ {m2 +69 1: >10 (C) \"In 3x x+3 x2 + 2x 15 . x \"1) 111.}, x2+ 3x + 4 . 8 x2 s so.) (H2) 3. Let f{x) : (x 1)2(x+3)(2x 5). Determine intervals forwhid1f(x) > Oand x)