a2-√22*a+1=0,则a-a/1=?
=IF(COUNTIF($A$1:A2,A2)>0,COUNTIF($A$1:A2,A2))
已知实数a满足a2+2a-1=0求(1 /a+1)-(a+3/a2-1)*(a2-2a+1/a2+4a+3)的值
已知a2+3a+1=0 求 1+1/a a2+1/a2
(a2-a)a2-2a-3÷a(a-3)=a(a-1)(a+1)(a
已知a2 3a 1=0求a 1/a;a2 1/a2;a4 1/a4
已知A2次方-2A+1=0,求A+A/1与A2次方+A2次方/1的值
若实数a满足a2-2a-1=0,则3a2-6a+5=______.
若实数a满足a2-2a+1=0,则2a2-4a+5=______.
已知A=-a-1,B=a2+a,C=2a2-5a-1
已知实数a满足a2+2a-8=0,则1a+1−a+3a
已知:a2+4a+1=0,且a
若a2-3a+1=0,求a2+a2/1的值