设x、y、x'、y'是自然数,定义(x,y,x',y')=xy+x'y',计算(1,2,3,4),(3,4,1,2),(2,3,4,1),(4,1,2,3),(14,10,14,10)的值.
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![设x、y、x'、y'是自然数,定义(x,y,x',y')=xy+x'y',计算(1,2,3,4),(3,4,1,2),(2,3,4,1),(4,1,2,3),(14,10,14,10)的值.](/uploads/image/z/2451082-58-2.jpg?t=%E8%AE%BEx%E3%80%81y%E3%80%81x%27%E3%80%81y%27%E6%98%AF%E8%87%AA%E7%84%B6%E6%95%B0%2C%E5%AE%9A%E4%B9%89%EF%BC%88x%2Cy%2Cx%27%2Cy%27%29%3Dxy%2Bx%27y%27%2C%E8%AE%A1%E7%AE%97%EF%BC%881%2C2%2C3%2C4%EF%BC%89%2C%EF%BC%883%2C4%2C1%2C2%EF%BC%89%2C%EF%BC%882%2C3%2C4%2C1%EF%BC%89%2C%EF%BC%884%2C1%2C2%2C3%EF%BC%89%2C%EF%BC%8814%2C10%2C14%2C10%EF%BC%89%E7%9A%84%E5%80%BC.)
设x、y、x'、y'是自然数,定义(x,y,x',y')=xy+x'y',计算(1,2,3,4),(3,4,1,2),(2,3,4,1),(4,1,2,3),(14,10,14,10)的值.
设x、y、x'、y'是自然数,定义(x,y,x',y')=xy+x'y',计算(1,2,3,4),(3,4,1,2),(2,3,4,1),(4,1,2,3),(14,10,14,10)的值.
设x、y、x'、y'是自然数,定义(x,y,x',y')=xy+x'y',计算(1,2,3,4),(3,4,1,2),(2,3,4,1),(4,1,2,3),(14,10,14,10)的值.
(1,2,3,4)=1*2+3*4=14;
(3,4,1,2)=3*4+1*2=14;
(2,3,4,1)=2*3+4*1=10;
(4,1,2,3)=4*1+2*3=10;
(14,10,14,10)=14*10+14*10=280.
14,14,10,10,280