Question

Tim gia tri cua a

( a + 1 ) + (a + 2 ) + ( a+ 9 ) + (a + 13 ) + ...+ (a + 29)= 152

 

 

Answer 1

Ta có ( a + 1 ) + (a + 2 ) + ( a+ 9 ) + (a + 13 ) + ...+ (a + 29)= 152

        => 29xa+435=152

           29xa=-283

            a=-283/29

Answer 2

Tim gia tri cua a

( a + 1 ) + (a + 2 ) + ( a+ 9 ) + (a + 13 ) + ...+ (a + 29)= 152

Ta có ( a + 1 ) + (a + 2 ) + ( a+ 9 ) + (a + 13 ) + ...+ (a + 29)= 152

        => 29xa+435=152

           29xa=-283

            a=-283/29