定义新运算“*”,已知1/M*N=1/m+1/N,如M*N=6,(1/M)*(1/N)=25,MN=?
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![定义新运算“*”,已知1/M*N=1/m+1/N,如M*N=6,(1/M)*(1/N)=25,MN=?](/uploads/image/z/2543818-58-8.jpg?t=%E5%AE%9A%E4%B9%89%E6%96%B0%E8%BF%90%E7%AE%97%E2%80%9C%2A%E2%80%9D%2C%E5%B7%B2%E7%9F%A51%2FM%2AN%3D1%2Fm%2B1%2FN%2C%E5%A6%82M%2AN%3D6%2C%281%2FM%29%2A%281%2FN%29%3D25%2CMN%3D%3F)
定义新运算“*”,已知1/M*N=1/m+1/N,如M*N=6,(1/M)*(1/N)=25,MN=?
定义新运算“*”,已知1/M*N=1/m+1/N,如M*N=6,(1/M)*(1/N)=25,MN=?
定义新运算“*”,已知1/M*N=1/m+1/N,如M*N=6,(1/M)*(1/N)=25,MN=?
M*N=1/(1/M+1/N)=MN/(M+N)=6得MN=6(M+n)
1/M*1/N=1/(M+N)=25得M+N=1/25综上所述MN=6/25