已知:媽媽比小孩大 21 歲,                                       
六年之後媽媽的年齡是小孩年齡的 5 倍。                         
請問:爸爸現在在哪裡?                                             

先不要看下面的解答,好好想一想,這是國中數學的東西~     
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
  .............                                                              
                                                                           
                                                                           
  參考解答:                                                            
                                                                           
                                                                           
  設媽 M 歲,小孩 C 歲 > >                                         
                                                                           
  M = C + 21                                                            
                                                                           
  M+6 = (C+6)*5                                                        
                                                                           
  解聯立: C = -3/4                                                      
                                                                           
                                                                           
  也就是說小孩子在九個月之後會出生                               
                                                                           
                                                                           
                                                                           
  所以,爸爸現在在媽媽上面!                                       
                                                                           
  .........................水喔!*_*........................

arrow
arrow
    全站熱搜

    vivian 發表在 痞客邦 留言(0) 人氣()