Các câu hỏi tương tự
choA= a+b-5 B=-b-c+1 C=b-c-4 D=b-a. Chung minh rang A+b= C-D
Cho a/b <1 va a,b thuoc N, b khong bang 0, c > 0. Chung minh a/b < a+c/b+c
Giup minh nhe! Cam on
chung minh dang thuc:
a, - ( 49 - 3x ) + 41 = 3x - 8
b, - ( a + b + c + 1 ) + ( b - c ) - ( a - c - 1 ) = - c - 2a
Cho A=a-b-5; B=-b+1; C=-b-6; D=b+a.
Chung minh A-B=C+D
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
chung minh dang thuc
a, [ b+c ]-b. [ a -c]= [ a+ b].c
b, [b-c ]-a. [b+d]=a.[c+d]
1.Chung minh rang
a-(b-c)=(a-b)+c=(a+b)-c
cho a,b,c thuoc z , chung minh rang : a(c-b) - b(-a-c) =c(a+b0
Cho a,b,c thuoc Z sao cho a.b=c.d+1 va a+b=c+d
Chung minh a=b