1、?ca cbabaccbacbabaccbacba3原式232331112674 6427273112642774121961691962716427491615102 . 321m2n6 159314322xxxxx8353535yxyx1, 2nmxmxnxxnxm11nnn或21nn21nnn2221nn21nn (1) 5x37x+9 (2) (3) (4)3 7(1)717 3xx334515xx3221211245xxx vvvvvv顺水静水水流逆水静水水流10 xx利润售价成本利润利润率成本打 折的售价原价利息本金 利率 存期本息和本金实得利息30+6140602xxx(469)
2、1696xxx2121&3&1&xxx163| 3axa0103| 3aa0103| 3aalaBAAB线段线段线段OM射线lBAAB直线直线直线10230a236a233mABCD2548cba 38221172ccccba21,17cbcaABCCABMCC4121或x1.5x 2.5xcmcm5 . 75 . 4与1164110020111394531. 6295129141905 . 790756305 . 03060805 . 5302x111010 x速度差路程差1110105 . 560OAB95?D?C?A?E?Bx2x521215212xx98已知 ABCOOCBA4530 或
