शून्येतर अदिशों α और β का मान सभी सदिशों  और  के लिए क्या है, कि  है?

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  1. α = 2, β = 1
  2. α = -2, β = -3
  3. α = 1, β = 3
  4. α = -2, β = 3

Answer (Detailed Solution Below)

Option 4 : α = -2, β = 3
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NIMCET 2020 Official Paper
120 Qs. 480 Marks 120 Mins

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संकल्पना:

यदि दो सदिश  और  बराबर हैं, तब a1 = b1, a2 = b2 और c1 = c2 है।

गणना:

दिया गया है: 

⇒ 

दोनों पक्षों के अदिश गुणांकों की तुलना करने पर, हम प्राप्त करते हैं:

2α + β = -1             ... (1)

-α + 2β = 8             ... (2)

समीकरण (2) के दुगुने को समीकरण (1) में जोड़ने पर, हम प्राप्त करते हैं:

5β = 15

⇒ β = 3

और समीकरण (1) या (2) का उपयोग करके, हम प्राप्त करते हैं:

α = -2

इसलिए, α = -2, β = 3

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