It's a question about the Mathematical Economics

1. p161 Exercise 7.2/Q7, Q8 7. Find the derivatives of: (a) (x2 + 3)/x (c) 6x/(x + 5) (b) ( x + 9)/x (d) (ax' + b) /(cx+d) 8. Given the function f(x) = ax + b, find the derivatives of: (o) f(x) (b) xf(x) (c) 1/f(x ) (d) f(x) /x 2. p165 Exercise 7.3/Q1, Q2, Q3 1. Given y = u' + 2v, where u = 5 -x2, find dy/ dx by the chain rule. 2. Given w = ay and y = bx? + cx, find dw/dx by the chain rule. 3. Use the chain rule to find dy/dx for the following: (@) y = (3x2 - 13)3 (b) y = (7x] - 5)9 (q) y = (ox + b)s