求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ)
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求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ)
而且一些什么平方号啊,几次项的符号我也看不懂,所以麻烦各位用语言,或者用简单的一些数字叙述一下.
而且一些什么平方号啊,几次项的符号我也看不懂,所以麻烦各位用语言,或者用简单的一些数字叙述一下.
=[(X+Z)+(X-Y)]/[X(X-Y)+Z(X-Y)]-[(X+Y)+(X+Z)]/[X(X+Y)+Z(X+Y)]
=[(X+Z)+(X-Y)]/[(X+Z)(X-Y)]-[(X+Y)+(X+Z)]/[(X+Z)(X+Y)]
=1/(X-Y)+1/(X+Z)-1/(X+Z)-1/(X+Y)
=1/(X-Y)-1/(X+Y)
=(X+Y-X+Y)/(X方-Y方)
=2X/(X方-Y方)
=[(X+Z)+(X-Y)]/[(X+Z)(X-Y)]-[(X+Y)+(X+Z)]/[(X+Z)(X+Y)]
=1/(X-Y)+1/(X+Z)-1/(X+Z)-1/(X+Y)
=1/(X-Y)-1/(X+Y)
=(X+Y-X+Y)/(X方-Y方)
=2X/(X方-Y方)
(2X+Z-Y)/(X^2-XY+XZ-YZ)-(Y-Z)/(X^2-XY-XZ+YZ)
求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ)
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