माना  और c = î - ĵ - k̂ तीन सदिश है।  और के तल में एक सदिश  क्या है, जिसका  पर प्रक्षेपण  है?

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  1. 3î - ĵ + 3k̂
  2. î - 3ĵ + 3k̂
  3. 5î - 2ĵ + 5k̂
  4. 2î - ĵ + 3k̂

Answer (Detailed Solution Below)

Option 1 : 3î - ĵ + 3k̂
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NIMCET 2020 Official Paper
120 Qs. 480 Marks 120 Mins

Detailed Solution

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गणना:

और c = î - ĵ - k̂

दिया गया है:   और  के तल में सदिश ,

इसलिए,

= (1 + )î + (1 - λ)ĵ + (1 + λ)k̂ .... (1)

 पर का प्रक्षेपण =

⇒ -(1 - λ) = 1

∴ λ = 2 

अब, λ का मान समीकरण (1) में रखने पर, हमें प्राप्त होता है 

= 3î - + 3k̂

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