— = a有增根,则a=___

— = a有增根,则a=___ 已知a²-4a+2=0,则a+2/a=___,a³-14a=___ Wait a moment,please=___,___ a moment,please. 若|-2a|=二分之一.则a等于___ 词组转换1 treat sth as a joke=___ ___ sth ___ a joke2 regret leaving school=regret ___ ___ ___ ___ A=x^2-xy,B=xy+y^2,则A+B=___,A-B=___,3A-2B=___. a,b属于正实数.且4a+b=1,则1/a+1/b的最小值是___,此时a=___,b=___. Walking along a path is better = ___ ___ ___ to walk alomg a path 若(9a^2)^3X(1/3)^8=4则a^12=___,a^3=___. be good at =___ ___ ___kuai a 已知a+b=14,b+c=20,a+c=16,则a=___,b=___,c=___ 若a^3(3a^m-2a^n+4a^k)=3a^9-2a^6+4a^4,则常数m、n、k的值分别为___、___、___. 正弦交流电i=sin(314t-45)A则该交流电的最大值___,有效值___,周期___,初相位___. 正弦交流电i=sin(314t-45)A则该交流电的最大值___,有效值___,周期___,初相位___. 已知：ab=-1 a+b=2,则式子b/a+a/b=___ 已知:ab=-1 a+b=2,则式子(b/a)+(a/b)=___ 若/a+3/+/2a-4/=0则a=___,b=____ 代数式2a+1与1+a互为相反数,则a=___