(Mathematics) NDA/NA SOLVED PAPER 2023 – II (51 to 100)

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Total Questions: 50

1. What is the directrix of the parabola?

Correct Answer: (a) y = - 1/8
Solution:

2. What is the length of latus rectum of the parabola?

Correct Answer: (b) 1/2
Solution:Since, length of lotus Rectum of parabola = 4 × 1/8 = 1/2

3. equal to?

Correct Answer: (b) ln(ab)/2
Solution:

4. equal to?

Correct Answer: (a) √ab
Solution:

5. What is the domain of the function?

Let f(x) = √2 - x + √2 + x .

Correct Answer: (b) [ -2, 2]
Solution:

6. What is the greatest value of the function?

Let f(x) = √2 - x + √2 + x .

Correct Answer: (c) √8
Solution:If we put x = 0
then f(x) = 2√2 = √8 is greatest value of f(x)

7. equal to?

Correct Answer: (b) -1
Solution:

8. equal to?

Correct Answer: (a) -2
Solution:

9. What is the value of a?

Correct Answer: (d) 3
Solution:-1 + a = 1 + 1 ⇒ a = 3

10. What is the value of b?

Correct Answer: (b) 1
Solution:⇒ -1 + a = a - b ⇒ b = 1