设x1,x2是方程2x^2-6x+3=0的两个根,利用跟与系数的关系,求下列各式的值(3) (x1+1/x2【x2分之1】)(x2+1/x1【x1分之1】)(4) 1/(x1)^2【x1²分之1】+1/(x2)^2【x2²分之1】【】←为补充可以给过程么....
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