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COMEDK2018MathematicsSequences and Series

If , and are in GP , then ⁶ - ² is

Options

  1. A1
  2. B1 / 2
  3. C2
  4. D3

Correct answer

A. 1

Step-by-step solution

, and are in GP. array ll So, & ² = & ³ = ² & ³ = 1 = cosec array Squaring both sides, we get gathered ⁶ = cosec ² ⁶ =1+ ² ⁶ - ² =1 gathered

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