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BITSAT Mathematics Sequences and Series 2020 BITSAT 2020

BITSAT Mathematics Question (2020) — Solution

Question

If a, b, c are positive numbers, then least value of (a+b+c) ( 1 a + 1 b + 1 c ) is

Options

  1. A. 1
  2. B. 6
  3. C. 9
  4. D. None

Answer

C. 9

Step-by-step solution

AM HM a+b+c 3 3 1 a + 1 b + 1 c (a+b+c) ( 1 a + 1 b + 1 c ) 9

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