1 a) 3
1b) 7
2a0
B =1/2×(2+2/2) = 1/2 × (2+1) = 1/2×3 = 3/2
C= 1/2 ×(3/2+2/(3/2) = 1/2 ×(3/2+2×(2/3))= 1/2 × 3/2+4/3= 1/2 × (9/6+8/6) = 1/2 × 17/6 = 17/12
D= 1/2 × ((17/12)+2/(17/12))= 1/2 × ((17/12)×2×(12/17))= 1/2×((17/12)×(24/17))= 1/2 × (24/12) = 1/2 × 2 = 1