Use a graphing utility to estimate the absolute maximum and

Question

1. Find the absolute maximum and minimum values of f on the given closed interval, and state where those values occur.

f(x) = 23x - 46 sin x; [-π/4, π/2].

2. Use a graphing utility to estimate the absolute maximum and minimum values of f, if any, on the stated interval, and then use calculus methods to find the exact values.

f(x) = 10 In (x² + 1) - 8x; [0, 3].