(5) (a) Which of the following is the correct form of the partial fraction decomposition of - x-1 , ? ac3 + 2-2 DA Ax +B Cx+D E + 2-2 Op Ax + B Ca + D Ex + F + x+1 DC. A B + x+1 Ax + B Ca + D Ex + F + (b) Which of the following is the correct form of the partial fraction decomposition of - x-1 x3 + x DA A Be + C + x2 + 1 OR A B - + x2 + 1 Do Ax + B + C x2+1 On Ax + B Cx + D + x2 +1