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यदि  तो k का मान है

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RPSC 2nd Grade Mathematics (Held on 30th June 2017) Official Paper
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  1. केवल 1
  2. केवल -1
  3. ± 1
  4. ± 

Answer (Detailed Solution Below)

Option 3 : ± 1
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Detailed Solution

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दिया है:

प्रयुक्त सूत्र:

गणना:

हमारे पास है,

⇒ 

⇒ 

L.H.S. से k उभयनिष्ठ लेने पर और RHS में k से गुणा और भाग करने पर, हम प्राप्त करते हैं

⇒ 

⇒ 

⇒ k2 = 1

⇒ k = ± 1

∴ k  का मान 1, -1 है.

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