作业帮设f(x)=log1/2[a^2x+2(ab)^x-3b^2x+1](a>0,b>0),解不等式f(x)＜0求真相,
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设f(x)=log1/2[a^2x+2(ab)^x-3b^2x+1](a>0,b>0),解不等式f(x)＜0求真相,
设f(x)=log1/2[a^2x+2(ab)^x-3b^2x+1](a>0,b>0),解不等式f(x)＜0
求真相,
设f(x)=log1/2[a^2x+2(ab)^x-3b^2x+1](a>0,b>0),解不等式f(x)＜0求真相,
log1/2[a^2x+2(ab)^x-3b^2x+1]＜0 ==> a^2x+2(ab)^x-3b^2x+1>1 ==> a^2x+2(ab)^x-3b^2x>0
化为 ((a/b)^x+3)((a/b)^x-1)>0 所以（a/b)^x>1=(a/b)^0
a>b时 ,x>0;a