1. Find the partial fraction decomposition for the rational 2x2 x + 4 function x3 +4x 2. Use the partial fraction decomposition of the functions to x + 5 evaluate the integralfdx 0' 1X\" 2) Solving using a formula is not acceptable. 3. Evaluate each of the following integrals, using a t_rigonometric substitution. Do not forget the back substitution. Solutions using other methods are not acceptable. dx (a) \" 4x2+1 l (b)fx2\\l16 - x2 dx Ml9d): (c) f