Toán 8/9-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2 Làm hộ em với ạ em đang cần gấp 07/09/2021 By Delilah 8/9-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2 Làm hộ em với ạ em đang cần gấp
Đáp án: =0 Giải thích các bước giải: 8/9-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2 =8/9 -(1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72) =8/9-(1/1.2+1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+1/7.8+1/8.9) =8/9- (2-1/1.2+3-2/2.3+4-3/3.4+5-4/4.5+7-6/6.7+8-7/7.8+9-8/8.9) =8/9-(1-1/2+1/2-1/3+……………+1/8-1/9) =8/9-8/9 =0 Trả lời
Trả lời 8/9 – 1/72 – 1/56 – 1/42 – 1/30 – 1/20 – 1/12 – 1/6 – 1/2 = 8/9 – ( 1/72 + 1/56 + 1/42 + 1/30 + 1/20 + 1/12 + 1/6 + 1/2 ) = 8/9 – ( 1/9.8 + 1/8.7 + …+ 1/3.2 + 1/2.1 )= 8/9 – ( 1 – 1/2 + 1/2 – 1/3 +….+ 1/8 – 1/9 )= 8/9 – ( 1 – 1/9 )= 8/9 – 8/9= 0 Trả lời
Đáp án:
=0
Giải thích các bước giải:
8/9-1/72-1/56-1/42-1/30-1/20-1/12-1/6-1/2
=8/9 -(1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72)
=8/9-(1/1.2+1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+1/7.8+1/8.9)
=8/9- (2-1/1.2+3-2/2.3+4-3/3.4+5-4/4.5+7-6/6.7+8-7/7.8+9-8/8.9)
=8/9-(1-1/2+1/2-1/3+……………+1/8-1/9)
=8/9-8/9
=0
Trả lời
8/9 – 1/72 – 1/56 – 1/42 – 1/30 – 1/20 – 1/12 – 1/6 – 1/2
= 8/9 – ( 1/72 + 1/56 + 1/42 + 1/30 + 1/20 + 1/12 + 1/6 + 1/2 )
= 8/9 – ( 1/9.8 + 1/8.7 + …+ 1/3.2 + 1/2.1 )
= 8/9 – ( 1 – 1/2 + 1/2 – 1/3 +….+ 1/8 – 1/9 )
= 8/9 – ( 1 – 1/9 )
= 8/9 – 8/9
= 0