R and B

R＆B（R and R and B R and B 具体是什么意思 A=｛(a,b)：a,b ∈R,and a 什么叫R and B(具体点）音乐的R and B风格,即是什么风格 什么叫R and 英语翻译White,R.A.and Ehmke,E.F.Krystow,P.EBiehl,J.A.and Schnake,E.A.,Couper,A.S.Hausler,R.H.and Coble,N.D.Humphries,M.H.and Sorell,G.,Wells,R.B.and Carson,H.S.Merrick,R.D.and Auerbach,T.,French,E.C.and Fahey,W.F.,Edmondson,J.G.and Lehrer,S.E.Ara r breakfast,Tom( ) eggs,orange and cake 三个选项 A.meets B.likes C.looks 证明R(A)+R(B)-R(AB) R B' R F2 R' B R F2 R B' R F2 R' B R F2 R2 r(A)+r(B)-n open your books and r() And it is often r[ ]. If p-q=4 and r is the number of integers less than p and greater than q,then which of thefollowing could be true?I.r=3 II.r=4 III.r=5 A.I only B.II only C.III only D.I and II E.I and II and III 如果ax + b = cx + d,x属于R,怎么证明a = c and b = d. 线性代数 证明R(ABC)>R(AB)+R(BC)-R(B) 线性代数 证明R(ABC)>R(AB)+R(BC)-R(B) 例如B[R,C]=B[R',C'] 这个R'