1/Tính nhanh 1.5.6+2.10.12+3.15.18+4.20.24+5.25.30/13.5+2.6.10+3.9.15+4.12.20+5.15.25 23/09/2021 Bởi Skylar 1/Tính nhanh 1.5.6+2.10.12+3.15.18+4.20.24+5.25.30/13.5+2.6.10+3.9.15+4.12.20+5.15.25
Đáp án + Giải thích các bước giải: `(1.5.6+2.10.12+3.15.18+4.20.24+5.25.30)/(1.3.5+2.6.10+3.9.15+4.12.20+5.15.25)=(1.5.6+1.2.5.2.6.2+1.3.5.3.6.3+1.4.5.4.6.4+1.5.5.5.6.5)/(1.3.5+1.2.3.2.5.2+1.3.3.3.5.3+1.4.3.4.5.4+1.5.3.5.5.5)=((1.5.6).(1+2+3+4+5))/((1.3.5).(1+2+3+4+5))=(1.5.6)/(1.3.5)=2` Bình luận
Đáp án : `(1.5.6+2.10.12+3.15.18+4.20.24+5.25.30)/(13.5+2.6.10+3.9.15+4.12.20+5.15.25)` `= (1.5.6+1.2.5.2.6.+1.3.5.3.6.3+1.4.5.4.6.4+1.5.5.5.6.5)/(1.3.5+1.2.3.2.5.2+1.3.3.3.5.3+1.4.3.4.5.4+1.5.3.5.5.5)` `=((1.5.6).(1+2+3+4+5))/((1.3.5).(1+2+3+4+5) ` `= ((1.5.6).\cancel((1+2+3+4+5)))/((1.3.5).\cancel((1+2+3+4+5)))` `= (1.5.6)/(1.3.5) = 2 ` `Go od luck!` Bình luận
Đáp án + Giải thích các bước giải:
`(1.5.6+2.10.12+3.15.18+4.20.24+5.25.30)/(1.3.5+2.6.10+3.9.15+4.12.20+5.15.25)=(1.5.6+1.2.5.2.6.2+1.3.5.3.6.3+1.4.5.4.6.4+1.5.5.5.6.5)/(1.3.5+1.2.3.2.5.2+1.3.3.3.5.3+1.4.3.4.5.4+1.5.3.5.5.5)=((1.5.6).(1+2+3+4+5))/((1.3.5).(1+2+3+4+5))=(1.5.6)/(1.3.5)=2`
Đáp án :
`(1.5.6+2.10.12+3.15.18+4.20.24+5.25.30)/(13.5+2.6.10+3.9.15+4.12.20+5.15.25)`
`= (1.5.6+1.2.5.2.6.+1.3.5.3.6.3+1.4.5.4.6.4+1.5.5.5.6.5)/(1.3.5+1.2.3.2.5.2+1.3.3.3.5.3+1.4.3.4.5.4+1.5.3.5.5.5)`
`=((1.5.6).(1+2+3+4+5))/((1.3.5).(1+2+3+4+5) `
`= ((1.5.6).\cancel((1+2+3+4+5)))/((1.3.5).\cancel((1+2+3+4+5)))`
`= (1.5.6)/(1.3.5) = 2 `
`Go od luck!`