Mathematics · Application of Derivatives
Find the intervals in which the function f(x) = x3 + 2x2 − 7x + 4 is strictly increasing.
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- 1(−∞, −7/3) ∪ (−7/3, 1)
- 2(−7/3, 1) ∪ (4, ∞)
- 3(−∞, −7/3) ∪ (1, ∞)✓
- 4(−∞, 1) ∪ (7/3, ∞)
Correct answer
(−∞, −7/3) ∪ (1, ∞)
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