解
x=1/(√2-1)=(√2+1)/(√2-1)(√2+1)=(√2+1)/(2-1)=√2+1
∴x²-2x+1
=(x-1)²
=(√2+1-1)²
=2
若x=根號2 -1分之1 則x²-2x+1值是
若x=根號2 -1分之1 則x²-2x+1值是
數(shù)學人氣:307 ℃時間:2020-05-13 13:12:27
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