已知实数a,b满足a>b,求证:-a^2-a<-b^3-b
已知实数a,b满足a>b,求证:-a^2-a<-b^3-b
已知实数a b c 满足a+b+c=3 求证 (1+a+a^2)(1+b+b^2)(1+c+c^2)>=9(ab+bc+
已知实数a b c满足a
已知实数a,b,c,满足a
已知a,b为实数,且2^a+3^b>2^(-b)+3(-a),求证:a+b>0
已知实数abc满足a+b+c=0,a>b>c,求证1/3<a/a-c<2/3
已知实数a.b满足a*a-3a=1,b*b-3b=1,求2b/a+2a/b的值
已知a,b,c是实数,求证a*a+b*b+c*c>=ab+3b+2c
已知a,b,c为互不相等的实数,且满足(a-c)^2-4(b-a)(c-b)=0求证:2b=a+c
已知实数a,b,c,满足a>b>c. 1)求证1/(a-b)+1/(b-c)+1/(c-a)>0 2)试将上述不等式加以
已知实数a,b,x,y,满足不等式(a+b)(x+y)>2(ay+bx),求证(x-y)/(a-b)+(a-b)/(x-
已知实数a、b、c满足等式a−2+|b+1|+(c+a−b)