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NDA Mathematics Functions 2026 NDA 2026 (Phase 1)

NDA Mathematics Question (2026) — Solution

Question

Passage: Consider the curves y=x^2 and y=2|x|. Question: What is the number of points of intersection of the curves ?

Options

  1. A. 4
  2. B. 3
  3. C. 2
  4. D. None

Answer

B. 3

Step-by-step solution

Equating the two given curves y = x^2 and y = 2|x|: x^2 = 2|x| Since x^2 = |x|^2, the equation becomes: |x|^2 - 2|x| = 0 |x|(|x| - 2) = 0 This gives |x| = 0 or |x| = 2. Solving for x, we get x = 0, x = 2, and x = -2. The corresponding points of intersection are (0, 0), (2, 4), and (-2, 4). The number of points of intersection is 3. Answer: 3

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