计算机构的自由度 5 n=5P=6 F=3×5-2×6=3 n=5P5=7 F=3×5-2×7=1计算机构的自由度 n = 5 P5 = 6 F = 3 ×5 – 2 × 6 = 3 2 1 3 4 5 6 n = 5 P5= 7 F = 3 × 5 – 2 × 7 = 1