exo上瘾韩文版:2/3a^2b+{3/2ab-[2a^2b-(2/5ab^2+3/1ab)]-2/1a^2b}
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a*a+3b*b≥2b(a+b)
a▲b=a/b-b/a,[2▲(5▲3)]=?
已知实数a,b满足a^2+3a-1=0,b^2+3b-1=0,求b/a+a/ b
答题!!!!!!!!!!!!!!!!!!!!2(a*a*a-3)(a-b+c)-3(b-a*a)(a+b-c)
a^2+b^2/a+b
3a^2b-{2a^2b+[9a^2b-(6a^2b+4a^2)]-(3a^2b-8a^2)},其中a=2/1,b=-3
(2a-3b)(a-4b)
a(a+b)(a+2b)(a+3b)+b^4=( )^2
化简:(2a-b-c)/(a-b)(a-c)+(2b-c-a)/(b-c)(b-a)+(2c-a-b)/(c-a)(c-b)
化简:b/(a+b) + b/(a -b) +(a^2+b^2)/(a^2 -b^2)