If _ x 1 x^2 - ax + b x - 1 = 7, then a + b is equal to

MHT CET 2024 Mathematics question

If , then a + b is equal to

Answer: (C)

The denominator tends to , and the limit is finite, so the numerator must also tend to at : , i.e. . Then apply L'Hôpital's rule: , so and

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Question ID VK-093286