x^2-1分之2x÷x+1分之1-x-1分之x其中x=2
x^2-1分之2x÷x+1分之1-x-1分之x
其中x=2
原式=(x²+x-2x)/(x+1)÷[(x-1)²/(x+1)(x-1)]
=(x²-x)/(x+1)÷[(x-1)/(x+1)]
=x(x-1)/(x+1)*(x+1)/(x-1)
=x
打字不易,
题目不知道有没有理解错
x^2-1分之2x÷x+1分之1-x-1分之x
其中x=2
原式=(x²+x-2x)/(x+1)÷[(x-1)²/(x+1)(x-1)]
=(x²-x)/(x+1)÷[(x-1)/(x+1)]
=x(x-1)/(x+1)*(x+1)/(x-1)
=x
打字不易,
题目不知道有没有理解错