8kx²-ky²=8怎么化简到x²/(1/k)-y²/(8/k)=1 忘了是怎么解的 了
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8kx²-ky²=8怎么化简到x²/(1/k)-y²/(8/k)=1 忘了是怎么解的 了
8kx²-ky²=8怎么化简到x²/(1/k)-y²/(8/k)=1 忘了是怎么解的 了
8kx²-ky²=8怎么化简到x²/(1/k)-y²/(8/k)=1 忘了是怎么解的 了
8kx^2-ky^=8
先两边同时除以8
就是kx^-(ky^2)/8=1
由于kx^=x÷(1/k)=x/(1/k)
同理ky^2/8=y^2/8÷(1/k)=y^2/(8/k)
带入就是:x/(1/k)-y^2/(8/k)=1
楼上正解!