Easy MCQ +4 / -1

If a, b, c are in HP, then:

  1. A b = (2ac)/(a+c) Correct answer
  2. B b = (a+c)/2
  3. C b² = ac
  4. D a + c = 2b

Solution

HP means reciprocals are in AP: 1/a, 1/b, 1/c in AP → 1/b = (1/a + 1/c)/2 → 2/ac = 1/a + 1/c → b = 2ac/(a+c).

About this question

Subject: Mathematics · Chapter: Sequences and Series · Topic: Harmonic Progression

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