對(duì)于任意的兩個(gè)實(shí)數(shù)對(duì).規(guī)定: .當(dāng)且僅當(dāng)a=c.b=d時(shí)成立. 運(yùn)算“ 為:(a,b) 運(yùn)算“ 為:(a,b) 設(shè).若(1.2)(p.q)= . 查看更多

 

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,bcad);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)

查看答案和解析>>


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“Ä”為:(a,b) Ä (c,d) = (ac+bd,bcad);運(yùn)算“Å”為:(a,b) Å (c,d) = (a + c,b + d),設(shè)x ,yÎ R,若(3,4) Ä (x ,y) = (11,-2),則(3,4) Å (x ,y) =(  )
A.(4,6)B.(4,6)C.(2,2)D.(5,5)

查看答案和解析>>

 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“Ä”為:a,b) Ä (c,d) = (acbd,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) =_________.

 

查看答案和解析>>

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) =


  1. A.
    (4,6)
  2. B.
    (4,6)
  3. C.
    (2,2)
  4. D.
    (5,5)

查看答案和解析>>

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) = (cd),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)=            .

查看答案和解析>>


同步練習(xí)冊(cè)答案