S=-a+b+c-c+b+a-a-b
=(-a+a)+(b-b)+(c-c)
=-a+b
\(\Rightarrow\)/S/=/-a+b/=a+b
S=-a+b+c-c+b+a-a-b
=(-a+a)+(b-b)+(c-c)
=-a+b
\(\Rightarrow\)/S/=/-a+b/=a+b
Cho a - b = 1. Tinh S biet:
S = - ( a - b - c ) + ( - c + b + a ) - ( a + b )
biet a - b = 1, tinh S = - ( a -b - c) + ( a - b- c) - ( a- b)
1)tìm hai số nguyên a,b biết :a>0 và a.(b-2)=3
2)cho a>0 tinh |s| biet: S=(a-b-c)+(-c+b+a)-(a+b)
giup minh di
1. Tim x thuoc Z biet:
7 < | x - 2 | < 10
2. Cho a+b = 1. Tinh :
S = -(-a+b-c) + (-c-b-a) - ( a-b)
Giai nhanh giup minh voi
cho a>b tim \s\ biet A=-(a-b-e)+(-c+b+a)-(a+b)
Cho a-b=1.Tinh S biet:S=-(a-b-c)+(-c+b+a)-(a+b)
cho a,b,c thuoc N* xa x+y+z=s=S biet :
S1=b/a.x+c/a.z
S2=a/b.x+c/d.z
S3=a/c.z+b/c.y
tìm c/s tn a,b biet a+b=30,BC(a,b) =6.ƯC(a,b)
1)CMR:(a+b-c)+(a-b)-(a-b-c)=a+b
2)chung minh A va B la hai so doi nhau biet:A=a-b+c;B=-a+b-c
3)cho a-b=1.tinhS biet :
S=-(a-b-c)+(-c+b+a)-(a+b)
ai lam duov 5 tick luon