问题描述:
已知(x-根号3)^2+Iy-cos30`I=0,求3xy-x^2y^2/xy-1*[1/xy-1 ]的值?
1,已知(x-根号3)^2+|y-cos30`|=0,求(3xy-x^2y^2)/(xy-1)*[1/xy-1 ]的值?
2,已知{(2x-3)/(x-1)(x+2)}=A/(x-1)+B/(x+2),求A,B的值?
3,已知:x+(1/x)=4,求(x^2/x^4+x^2+1)的值?
1,已知(x-根号3)^2+|y-cos30`|=0,求(3xy-x^2y^2)/(xy-1)*[1/xy-1 ]的值?
2,已知{(2x-3)/(x-1)(x+2)}=A/(x-1)+B/(x+2),求A,B的值?
3,已知:x+(1/x)=4,求(x^2/x^4+x^2+1)的值?
问题解答:
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