55. let : p= {a = x0, x13 xn =b} oa partiuon of la, b] and m, and m; be the supremum and infimum olj n ar then is called the upper sum offto the partition of p.

55. Let : P= {a = X0, X13 Xn =b} Oa partiuon of la, b] and M, and m; be the supremum and infimum olj n Ar Then IS called the upper sum offto the partition of P. (A) M,Ax (B) 2,ax (C)2-1 m,M,Ax; (D) None of these 56. Which of the following is a partition of the interval [0, 4] "2 (A) {0,2, 1, 4} (B) (0, 1, 2, 3, 4) (C)0, 2, 4, 3} (D) None of these 57. The set of points {x0, X1, ..., 2x}with 0 = X0S x S .. S X7-1 Š Xn =1s a partition of the interval (A) [0.5, 1] (B) [0, 1.5] (C) , 0] (D) [0, 1] 58. Let : P={a = Xo, X1, Xn = b} be a partition of [a, b] and M; and m, be the supremum and infimum of fin Ax. Then is called the lower sum off to the partition of P. (A) M,Ar (B) m,Ax (C) , M,Ar (D) None of these