CAT 2025 Quant was dominated by Algebra followed by Arithmetic. In Arithmetic, the questions were dominated by topics like Speed-time-distance, Mixture and Alligations. This year, there was a surprise. The questions from Geometry were relatively on the lower side as compared to the previous years. There were 8 TITA Qs this year. Overall this section was at a medium level of difficulty.
Question 4 : Let \( f ( x ) = \frac { x } { ( 2 x - 1 ) } \) and \( g ( x ) = \frac { x } { ( x - 1 ) } \). Then, the domain of the function \( h ( x ) = f ( g ( x ) ) + g ( f ( x ) ) \) is all real numbers except
\(f(x)\) is undefined when \(2x-1=0\Rightarrow x=\frac{1}{2}\)
\(g(x)\) is undefined when \(x-1=0\Rightarrow x=1\)
exclusions where \(g(x)=\frac{1}{2}\)
\(g(x)=\frac{x}{x-1}=\frac{1}{2}\Rightarrow2x=x-1\Rightarrow x=-1\)
exclusions where \(f(x)=1\)
\(f(x)=\frac{x}{2x-1}=1\Rightarrow x=2x-1\Rightarrow x=1\) (already excluded)
The domain of \(h(x)\) is all real numbers except \(-1,\frac{1}{2},1\).
The question is " Let \( f ( x ) = \frac { x } { ( 2 x - 1 ) } \) and \( g ( x ) = \frac { x } { ( x - 1 ) } \). Then, the domain of the function \( h ( x ) = f ( g ( x ) ) + g ( f ( x ) ) \) is all real numbers except "
Choice 1 is the correct answer.
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