5/1.2 + 4/1.11 + 3/11.2 + 1/2.15+13/15.4 +15/4.43 04/09/2021 Bởi Hadley 5/1.2 + 4/1.11 + 3/11.2 + 1/2.15+13/15.4 +15/4.43
Đáp án + Giải thích các bước giải: Đặt A=51.2+41.11+311.2+12.15+1315.4+154.43A=51.2+41.11+311.2+12.15+1315.4+154.43 17A=51.2.7+41.11.7+311.2.7+12.15.7+1315.47+154.43.717A=51.2.7+41.11.7+311.2.7+12.15.7+1315.47+154.43.7 17A=52.7+47.11+311.14+114.15+1315.28+1528.4317A=52.7+47.11+311.14+114.15+1315.28+1528.43 17A=12−17+17−111+111−114+114−115+115−128+128−14317A=12-17+17-111+111-114+114-115+115-128+128-143 17A=12−143=418617A=12-143=4186 A=4186:17=28786 Bình luận
Đáp án + Giải thích các bước giải: Đặt `A=5/(1.2)+4/(1.11)+3/(11.2)+1/(2.15)+13/(15.4)+15/(4.43)` `1/7A=5/(1.2.7)+4/(1.11.7)+3/(11.2.7)+1/(2.15.7)+13/(15.47)+15/(4.43.7)` `1/7A=5/(2.7)+4/(7.11)+3/(11.14)+1/(14.15)+13/(15.28)+15/(28.43)` `1/7A=1/2-1/7+1/7-1/11+1/11-1/14+1/14-1/15+1/15-1/28+1/28-1/43` `1/7A=1/2-1/43=41/86` `A=41/86 : 1/7=287/86` Bình luận
Đáp án + Giải thích các bước giải:
Đặt A=51.2+41.11+311.2+12.15+1315.4+154.43A=51.2+41.11+311.2+12.15+1315.4+154.43
17A=51.2.7+41.11.7+311.2.7+12.15.7+1315.47+154.43.717A=51.2.7+41.11.7+311.2.7+12.15.7+1315.47+154.43.7
17A=52.7+47.11+311.14+114.15+1315.28+1528.4317A=52.7+47.11+311.14+114.15+1315.28+1528.43
17A=12−17+17−111+111−114+114−115+115−128+128−14317A=12-17+17-111+111-114+114-115+115-128+128-143
17A=12−143=418617A=12-143=4186
A=4186:17=28786
Đáp án + Giải thích các bước giải:
Đặt `A=5/(1.2)+4/(1.11)+3/(11.2)+1/(2.15)+13/(15.4)+15/(4.43)`
`1/7A=5/(1.2.7)+4/(1.11.7)+3/(11.2.7)+1/(2.15.7)+13/(15.47)+15/(4.43.7)`
`1/7A=5/(2.7)+4/(7.11)+3/(11.14)+1/(14.15)+13/(15.28)+15/(28.43)`
`1/7A=1/2-1/7+1/7-1/11+1/11-1/14+1/14-1/15+1/15-1/28+1/28-1/43`
`1/7A=1/2-1/43=41/86`
`A=41/86 : 1/7=287/86`