x²-3x+1=0∴x+1/x-3=0∴x+1/x=3x²+1/x²=(x+1/x)²-2=3²-2=7x^4+1/x^4=(x²+1/x²)²-2=7²-2=47明教为您解答,请点击[满意答案];如若您有不满意之处,请指出,我一定改正!希望...