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Ex 4.1, 7 - Find x if (i) |2 4 5 1| = |2x 4 6 x| - Determinants - Ex 4.1

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  1. Class 12
  2. Important Question for exams Class 12
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Ex 4.1, 7 Find values of x, if (i) 2﷮4﷮5﷮1﷯﷯ = 2x﷮4﷮6﷮x﷯﷯ Now 2﷮4﷮5﷮1﷯﷯ = 2x﷮4﷮6﷮x﷯﷯ Putting values − 18 = 2x2 – 24 2x2 – 24 = − 18 2x2 = − 18 + 24 2x2 = 6 x2 = 6﷮2﷯ x2 = 3 x = ± ﷮𝟑﷯ Hence value of x is ± ﷮3﷯ Ex 4.1, 7 Find values of x, if (ii) 2﷮3﷮4﷮5﷯﷯ = 𝑥﷮3﷮2𝑥﷮5﷯﷯ Now, given that 2﷮3﷮4﷮5﷯﷯ = 𝑥﷮3﷮2𝑥﷮5﷯﷯ Putting values – 2 = – x 2 = x x = 2 Hence value of x is 2

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He provides courses for Mathematics from Class 9 to 12. You can ask questions here.
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