练习题49答案: 7 F) j# r7 b/ L c6 n5 `1. a 值为何? " { B, J8 H" U' ` b.49.8329 ' f0 V$ W2 Q. K+ T. k
2. b 值为何?+ q3 B& K' b! W* R9 F; L
a. 16.6667 * l! D |' {* ?; u3. c 值为何? " w1 O9 e' T |4 P; v/ B6 N c. 38.94469 D! ~9 C- D5 I7 h3 o9 e
4. 蓝剖面线区域之面积为何?% D$ T" ~% R0 v
a. 1067.3350