B=[a+b]+[b-c]+[d-4]-[b-d]
Vs a=4/3
b=-5/4
c=-7/12
d=-11/6
HELLP T-T
B=[a+b]+[b-c]+[d-4]-[b-d] Vs a=4/3 b=-5/4 c=-7/12 d=-11/6 HELLP T-T
By Ruby
By Ruby
B=[a+b]+[b-c]+[d-4]-[b-d]
Vs a=4/3
b=-5/4
c=-7/12
d=-11/6
HELLP T-T
B=(a+b)+(b-c)+(d-4)-(b-d)
= a+b+b-c+d-4-b+d
= a+b-c+2d-4
= `4/3`+(`-5/4`)-(`-7/12`)+(`-22/6`)-4
= (`4/3`+`-11/3`)+(-`5/4`+`7/12`)-4
= `-7/3`+(`-2/3`)-4
= -3-4=-7
Đáp án:
Giải thích các bước giải:
`B=[a+b]+[b-c]+[d-4]-[b-d]`
`=a+b+b-c+d-4-b+d`
`=a+b-c+2d-4`
thay `a=4/3 b=-5/4 c=-7/12 d=-11/6` ta có
`B=4/3+(-5)/4+7/12+(-22)/6-4`
`=(4/3-11/3)+(7/12-5/4)-4`
`=(-7)/3+(-2)/3-4`
`=-3-4=-7`