求解答(x- x/x²-1)/(2+1/x-1 - 1/x+1)

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求解答(x-x/x²-1)/(2+1/x-1-1/x+1)求解答(x-x/x²-1)/(2+1/x-1-1/x+1)求解答(x-x/x²-1)/(2+1/x-1-1/x+

求解答(x- x/x²-1)/(2+1/x-1 - 1/x+1)
求解答(x- x/x²-1)/(2+1/x-1 - 1/x+1)

求解答(x- x/x²-1)/(2+1/x-1 - 1/x+1)
原式=(x³-x-x)/(x+1)(x-1)÷(2x²-2+x+1-x+1)/(x+1)(x-1)
=(x³-2x)/(x+1)(x-1)×(x+1)(x-1)/2x²
=x(x²-2)/(x+1)(x-1)×(x+1)(x-1)/2x²
=(x²-2)/2x

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