, then y =\[f(x)\]represents
A) a straight line parallel to x-axis
B) a straight line parallel to y-axis
C) parabola
D) a straight line with negative slope
Correct Answer: B
Solution :
[b] \[{{R}_{3}}\to {{R}_{3}}-2{{R}_{2}}\], hence two identical rows \[\Rightarrow f(x)=\]constant.
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