这个题...可真难已知:xˇ2-5x-1994=0求代数式[(x-2)ˇ4+(x-1)ˇ2-1]/[(x-1)(x-2)
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/12 21:20:43
这个题...可真难
已知:xˇ2-5x-1994=0
求代数式[(x-2)ˇ4+(x-1)ˇ2-1]/[(x-1)(x-2)]的值
已知:xˇ2-5x-1994=0
求代数式[(x-2)ˇ4+(x-1)ˇ2-1]/[(x-1)(x-2)]的值
(x-2)^4+(x-1)^2-1=(x-1)^2+[(x-2)^2+1][(x-2)^2-1]
=(x-1)^2+[(x-2)^2+1][(x-2)+1][(x-2)-1]
=(x-1)^2+[(x-2)^2+1](x-1)(x-3)
=(x-1)[x-1+x(x-2)^2+x-3(x-2)^2-3]
=(x-1)[2x-4+x(x-2)^2-3(x-2)^2]
=(x-1)(x-2)[2+x(x-2)-3(x-2)]
=(x-1)(x-2)[2+x^2-2x-3x+6]
=(x-1)(x-2)[x^2-5x+8]
[(x-2)ˇ4+(x-1)ˇ2-1]/[(x-1)(x-2)]
=x^2-5x+8=1994+8=2002
=(x-1)^2+[(x-2)^2+1][(x-2)+1][(x-2)-1]
=(x-1)^2+[(x-2)^2+1](x-1)(x-3)
=(x-1)[x-1+x(x-2)^2+x-3(x-2)^2-3]
=(x-1)[2x-4+x(x-2)^2-3(x-2)^2]
=(x-1)(x-2)[2+x(x-2)-3(x-2)]
=(x-1)(x-2)[2+x^2-2x-3x+6]
=(x-1)(x-2)[x^2-5x+8]
[(x-2)ˇ4+(x-1)ˇ2-1]/[(x-1)(x-2)]
=x^2-5x+8=1994+8=2002
这个题...可真难已知:xˇ2-5x-1994=0求代数式[(x-2)ˇ4+(x-1)ˇ2-1]/[(x-1)(x-2)
已知实数x满足5x*x-3x-5=0,求代数式5x*x-2x-1/5x*x-2x-5的值.
已知实数x满足5x*x-3x-5=0,求代数式5x*x-2x-[1/5x*x-2x-5]的值.
已知x^2+x+1=0,求代数式x^1991+x^1992+...+x^1999
已知(x-根号2+1)(x-2)=0,求代数式[(x-1)/(x-3)-(x-4)/x]÷(x^2+x-6)/(x^2+
已知实数x满足(x+1)(x-2)(x+3)(x-4)+16=0,求代数式x2-x+1
若x^3+x^2+x+1=0,求代数式1+x+x^2+x^3+x^4+x^5+...+x^2006+x^2007的值
已知x²+x-1=0 求代数式2x³+4x²+3
已知x^2-5x+1=0,求代数式的值 (1)x^2+1/x (2)x^/(x^4+x^2+1)
已知x×x-5x2004=0,求代数式{(x-2)×(x-2)×(x-2)-(x-1)×(x-1)+1}/x-2的值.
已知(x-根号2+1)(x-3)=0,求代数式{[(x-1)/(x-3)]-[(x-4)/x]}/[(x的平方+x-6)
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值