1.x^-x-1=02.4x^2-2x-1=0

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1.x^-x-1=02.4x^2-2x-1=01.x^-x-1=02.4x^2-2x-1=01.x^-x-1=02.4x^2-2x-1=0x²-x-1=0x=(1±√5)/2即x1=(1+√

1.x^-x-1=02.4x^2-2x-1=0
1.x^-x-1=0
2.4x^2-2x-1=0

1.x^-x-1=02.4x^2-2x-1=0
x²-x-1=0
x=(1±√5)/2
即 x1=(1+√5)/2;x2=(1-√5)/2
4x²-2x-1=0
x=(2±√20)/8=(2±2√5)/8=(1±√5)/4
即 x1=(1+√5)/4 ;x2=(1-√5)/4

1.x²-x-1=0
b²-4ac=5
x=(1±√5)/2
2.4x^2-2x-1=0
b²-4ac=20
x=(2±2√5)/8=(1±√5)/4

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