先化简,再求值x-4⼀(x눀-1)除以x눀-3x-4⼀(x눀+2x+1)+1⼀(x-1),其中x=2倍根号3+1

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2024-12-20 10:58:52
推荐回答(2个)
回答1:

您好:

x-4/(x²-1)除以x²-3x-4/(x²+2x+1)+1/(x-1)
=(x-4)/(x+1)(x-1)÷(x+1)(x-4)/(x+1)²+1/(x-1)
=1/(x-1)+1/(x-1)
=2/(x-1)
=2/(2√3+1-1)
=2/2√3
=1/√3
=√3/3

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回答2:

(x-4)/(x-1)(x+1)乘以(x-1)²/()x+1(x-4))+1/(x-1)
=(x+1)/(x-1)+1/(x-1)
=()x+2(x-1)
=1+(根号3/2)