(x分之1-2分之1)除以(1-4x分之x^2+4)怎么做?

问题描述:

(x分之1-2分之1)除以(1-4x分之x^2+4)怎么做?

=(2-x)/2x÷(4x-x²-4)/4x
=-(x-2)/2x×[-4x/(x-2)²]
=2/(x-2)

(x分之1-2分之1)除以(1-4x分之x^2+4)
=(2-x)/2x÷(4x-x²-4)/4x
=(2-x)/2x÷[-(2-x)²)/4x]
=2/(x-2)