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A.
\(x < -1, x < -\frac{1}{3}\)
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B.
\(x > -1, x > -\frac{1}{3}\)
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C.
\(x > \frac{1}{3}, x < -1\)
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D.
\(x < \frac{1}{3}, x > -1\)
Correct Answer: Option B
Explanation
\(3x^{2} + 4x + 1 > 0 \)
\(3x^{2} + 3x + x + 1 > 0\)
\(3x(x + 1) + 1(x + 1) > 0\)
\((3x + 1)(x + 1) > 0\)
\(3x + 1 > 0 \implies 3x > -1 \)
\(x > -\frac{1}{3}\)
\(x + 1 > 0 \implies x > -1\)
\(x > -1, x > -\frac{1}{3}\)
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