a&b=a+1/b a%b=b+1/a先已知(2%x)&x=7/2求x^2+1/x^2 和 x-1/x
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a&b=a+1/b a%b=b+1/a先已知(2%x)&x=7/2求x^2+1/x^2 和 x-1/x
a&b=a+1/b a%b=b+1/a先已知(2%x)&x=7/2求x^2+1/x^2 和 x-1/x
a&b=a+1/b a%b=b+1/a先已知(2%x)&x=7/2求x^2+1/x^2 和 x-1/x
a&b=a+1/b a%b=b+1/a (2%x)&x=(2%x)+1/x=x+1/2+1/x=7/2 x+1/x=7/2-1/2=3 (x+1/x)=9 x+2+1/x=9 x+1/x=7 x-2+1/x=5 (x-1/x)=5 x-1/x=±√5