cook

30、直角三脚型的面及等于衣， 求其一个直脚边的值域； ------------------------------------ 0〈X〈2 ==================================== S=!/2a*b=> ab=2 a, b >0 , but we can'g get a or b <2 . 32、小于1000的偶数中，是11的倍数或19的倍数或是二者的倍数的个数？69 ----------------- 69 本月3次了。 ========================== My Answer 45+27+2=74. What's wrong? thanks!

cook

Are you sure? 998/22+998/38-998/(22*19)= 45 + 26+ 2=73  not 69? how? actually 998/38 is not correct. open for discusion!

cook

Brigitter : thanks for help me out!