tính giá trị biểu thức (1/2 – 1/3) + (1/3 – 1/4) + (1/4 -1/5) + (1/5- 1/6) + (1/6 – 1/7) + (1/7 – 1/8) + (1/8- 1/9) + (1/9 +

2 bình luận về “tính giá trị biểu thức (1/2 – 1/3) + (1/3 – 1/4) + (1/4 -1/5) + (1/5- 1/6) + (1/6 – 1/7) + (1/7 – 1/8) + (1/8- 1/9) + (1/9 +”

1. (1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)

   =(1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10)

   =1/2+1/10

   ={5+1}/10

   =3/5

   Trả lời
2. (1/2 – 1/3) + (1/3 – 1/4) + (1/4 -1/5) + (1/5- 1/6) + (1/6 – 1/7) + (1/7 – 1/8) + (1/8- 1/9) + (1/9 + 1/10)

   = 1/2 – 1/3 + 1/3 – 1/4 + 1/4 -1/5 + 1/5- 1/6 + 1/6 – 1/7 + 1/7 – 1/8 + 1/8 – 1/9 + 1/9 + 1/10

   =1/2 + 1/10

   =3/5

   Xin hay nhất

    

   Trả lời