What is the value of m which satisfies 3m2 – 21m + 30 < 0?
Explanation:
3m2 – 21m + 30 < 0
∴ m2 – 7m + 10 < 0 ⇒ (m – 5)(m – 2) < 0.
⇒ (m – 5) < 0 and (m – 2) > 0
∴ 2 < m < 5.
Hence, option (c).
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