HỌ NGUYÊN HÀM CỦA HÀM SỐ $ F\LEFT( X \RIGHT) = \FRAC{X}{{\SQRT {{X^2} + 1} }}$ LÀ:
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Level:
Medium
Question Types: Multiple choice
Answers:
- $ F\\\left( x \\\right) = 2\\\sqrt {{x^2} + 1} + C$.
- $ F\\\left( x \\\right) = \\\frac{2}{{3\\\left( {{x^2} + 1} \\\right)}} + C$.
- $ F\\\left( x \\\right) = \\\ln \\\sqrt {{x^2} + 1} + C$.
- $ F\\\left( x \\\right) = \\\sqrt {{x^2} + 1} + C$.