Toán A= 50+ 50/3+25/3+20/4+10/3+100/6.7+…+100/98.99+1/99 28/07/2021 By Alice A= 50+ 50/3+25/3+20/4+10/3+100/6.7+…+100/98.99+1/99
Đáp án: `A=99` Giải thích các bước giải: `A=50+ 50/3+25/3+20/4+10/3+100/6.7+…+100/98.99+1/99` `A=100/2+100/6+100/12+100/20+100/30+100/6.7+…+100/98.99+100/99.100` `A=100/1.2+100/2.3+100/3.4+100/4.5+100/5.6+100/6.7+…+100/98.99+100/99.100` `A/100=1/1.2+1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+…+1/98.99+100/99.100` `A/100=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+…+1/98-1/99+1/99-1/100` `A/100=1-1/100` `A=100(1-1/100)` `A=100-1` `A=99` Vậy `A=99`. Trả lời
$#Na KaZa$ Đáp án: `A=99` Giải thích các bước giải: `A= 50+ 50/3+25/3+20/4+10/3+100/6.7+…+100/98.99+1/99` `A=100/1.2+100/2.3+100/3.4+100/4.5+100/5.6+100/6.7+…+100/98.99+100/99.100``A : 100=1/1.2+1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+…+1/98.99+100/99.100``A/100=1/1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+…+1/98-1/99+1/99-1/100``A/100 = 1/1 – 1/100``A/100 = 99/100``A=99/(100).100``A=99` Trả lời
Đáp án:
`A=99`
Giải thích các bước giải:
`A=50+ 50/3+25/3+20/4+10/3+100/6.7+…+100/98.99+1/99`
`A=100/2+100/6+100/12+100/20+100/30+100/6.7+…+100/98.99+100/99.100`
`A=100/1.2+100/2.3+100/3.4+100/4.5+100/5.6+100/6.7+…+100/98.99+100/99.100`
`A/100=1/1.2+1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+…+1/98.99+100/99.100`
`A/100=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+…+1/98-1/99+1/99-1/100`
`A/100=1-1/100`
`A=100(1-1/100)`
`A=100-1`
`A=99`
Vậy `A=99`.
$#Na KaZa$
Đáp án:
`A=99`
Giải thích các bước giải:
`A= 50+ 50/3+25/3+20/4+10/3+100/6.7+…+100/98.99+1/99`
`A=100/1.2+100/2.3+100/3.4+100/4.5+100/5.6+100/6.7+…+100/98.99+100/99.100`
`A : 100=1/1.2+1/2.3+1/3.4+1/4.5+1/5.6+1/6.7+…+1/98.99+100/99.100`
`A/100=1/1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+…+1/98-1/99+1/99-1/100`
`A/100 = 1/1 – 1/100`
`A/100 = 99/100`
`A=99/(100).100`
`A=99`