͹ء͹ءŢԵ͹ءâҤԵ
  ͹ءҧ͹ء͹ءŢԵ͹ءâҤԵ 
                        
 
 
                        
             
Ҽźǡͧ͹ء͹ءŢԵ ͹ءâҤԵ ѵԢͧѭѡɳ᷹úǡ (S)  ͧҡ    ѧҧ仹
 
ҧ 1        Ҽźǡ  15 áͧ͹ء 1 + 9 + 25 + 49 + + (2n-1)2+
Ըշ                
                             
                             
                       
                             
                             
 
 
 
 
 
 
 
 
 
ҧ 2        Ҽźǡ  10  áͧ͹ء
                        
Ըշ                 
                               
                                
                                
                                
 
ҧ 3        Ҽźǡ 12 áͧ͹ء 
Ըշ
                                                       
                                                       
                                                        
 
 
ҧ 2