设a,b∈R+,a+2b=3,则1a+1b
设a,b∈R+,a+2b=3,则1a+1b
设a,b∈R,集合{1,a+b,a}={0,b/a,b},则b-a=?
设a,b∈R,且a+b=3,那2^a+2^b+1的最小值是
设a+b+c,b+c-a,c+a-b,a+b-c成G.P,公比为a/c,试证r^3+r^2+r=1
设a,b属于R+,求证a^2+b^2>=ab+a+b-1
设a b∈R,则“a>1且0
设a,b∈r,集合﹛1,a-b,a﹜=﹛0,-b/a,-b﹜,则a+b=?
设a、b∈R+,证明b/a^3+a/b^3>=1/a^2+1/b^2 用均值不等式
元素与集合设a,b∈R,集合{1,a,a+b}={0,b/a,b},①则a^2012+b^2011=?②若3∈{a+2,
设3阶方阵A=(a1,b,r) ,3阶方阵B=(a2,b,r) ,且|A|=2,|B|=-1 求|A+B|=
设a,b,c ∈ R,且a ∈ (0,1),b=a^a,c=a^b,则a,b,c的大小关系为
设a,b∈R,(2+b)/(a-i)=0.5-i,则a+bi=