\left|x \right|+\left|y \right|< 4,log_{2}(2y-x^{2}+4)>log_{2}(y+1)
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1 Answers
Lokesh Verma
·2009-03-10 00:08:16
\text{Log is a increasing function} \\ \Rightarrow x<y\Leftrightarrow log x< log y \text{ base must be greater than 1 }\\ so (2y-x^2+4)>y+1 \\ \Rightarrow x^2-y-3<0
now can u fill the gaps?