DeterminantHard

Question

If f′(x) =, then y = f(x) represents -

Options

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

Solution

On performing R3 → R3 - R1 - 2R2
we get f,(x) = 0     ⇒    f(x) = c
⇒  a straight line parallel to x-axis

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