題目列表(包括答案和解析)
對(duì)于任意的兩個(gè)實(shí)數(shù)對(duì) (a,b) 和 (c,d),規(guī)定:(a,b) = (c,d)當(dāng)且僅當(dāng) a = c,b = d;運(yùn)算“??”為:(a,b) ?? (c,d) = (ac+bd,bc -ad);運(yùn)算“??”為:(a,b) ?? (c,d) = (a + c,b + d),設(shè)x ,y ?? R,若(3,4) ?? (x ,y) = (11,-2),則(3,4) ?? (x ,y) =( )
A. (4,6) B.(4,6) C.(2,2) D.(5,5)
A.(4,6) | B.(4,6) | C.(2,2) | D.(5,5) |
對(duì)于任意的兩個(gè)實(shí)數(shù)對(duì) (a,b) 和 (c,d),規(guī)定:(a,b) = (c,d)當(dāng)且僅當(dāng) a = c,b = d;運(yùn)算“Ä”為:a,b) Ä (c,d) = (ac-bd,bc + ad);運(yùn)算“Å”為:(a,b) Å (c,d) = (a + c,b + d),設(shè)p、q Î R,若(1,2) Ä (p,q) = (5,0),則 (1,2) Å (p,q) =_________.
對(duì)于任意的兩個(gè)實(shí)數(shù)對(duì)(a,b)和(c,d),規(guī)定:
(a,b) = (c,d),當(dāng)且僅當(dāng)a = c,b = d時(shí)成立.
運(yùn)算“”為:,
運(yùn)算“”為:
現(xiàn)設(shè)= .
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