摘要:对于任意的两个实数对(a,b)和(c,d),规定(a,b)=(c,d)当且仅当a=c,b=d;运算“ 为:.运算“ 为:.设.若 则 A. B. C. D.
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对于任意的两个实数对 (a,b) 和 (c,d),规定:(a,b) = (c,d)当且仅当 a = c,b = d;运算“??”为:(a,b) ?? (c,d) = (ac+bd,bc -ad);运算“??”为:(a,b) ?? (c,d) = (a + c,b + d),设x ,y ?? R,若(3,4) ?? (x ,y) = (11,-2),则(3,4) ?? (x ,y) =( )
A. (4,6) B.(4,6) C.(2,2) D.(5,5)
查看习题详情和答案>>对于任意的两个实数对 (a,b) 和 (c,d),规定:(a,b) = (c,d)当且仅当a = c,b = d;运算“Ä”为:(a,b) Ä (c,d) = (ac+bd,bc-ad);运算“Å”为:(a,b) Å (c,d) = (a + c,b + d),设x ,yÎ R,若(3,4) Ä (x ,y) = (11,-2),则(3,4) Å (x ,y) =( )
A.(4,6) | B.(4,6) | C.(2,2) | D.(5,5) |
对于任意的两个实数对 (a,b) 和 (c,d),规定:(a,b) = (c,d)当且仅当 a = c,b = d;运算“Ä”为:a,b) Ä (c,d) = (ac-bd,bc + ad);运算“Å”为:(a,b) Å (c,d) = (a + c,b + d),设p、q Î R,若(1,2) Ä (p,q) = (5,0),则 (1,2) Å (p,q) =_________.
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