已知XX--5X+1=0,则xxxx+1/X的4次=?
已知xx+x-1=0,求:xx+1/xx,xxxx+1/xxxx
已知xx-5x+1=0,求xxxx+1/xx的值
已知x/(xx+x+1)=a,求xx/(xxxx+xx+1)的值
已知xx-2x-1=0,求xxxx-xxx-5xx-7x+5的值拜托各位大神
已知x+1/x=3,求(xx)/(xxxx+xx+1)的值
已知:3x=xx-x+1求(xxxx+xx+1)分之xx
已知f(x-1/x)=xx/(1+xxxx),求f(x)
xx-3x+1=0求xxxx+1÷(xxxx)=?
x+xx+xxx=xxxx
已知X*X-5X+1=0,求X*X+1/XX的值
已知XX+X+1=0,求XXX+2XX+2X+3的值
若多项式xxxx-(a-1)xxx+5xx-(b+3)x-1不含xxx和x项,则a+b=_____