1. Solve the following system of equations - += 3 + += 11 + +2=8 2. Find the extrema of the function z=-x2 - 12 + 4(x-v). 3. Find the average value of function on the interval [a; b]: f(x) =, a = 1, b=2 4. Find the general solution for the differential equation y' = y . X 5. Find the Tailor series for the function y = cos2x about X = 0