Miscellaneous

Chapter 3 Class 12 Matrices
Serial order wise

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

Transcript

Misc 6 Find x, if [x -5 -1] [■8(1&0&[email protected]&2&[email protected]&0&3)] [■8(𝑥@[email protected])] = O 〖"[x −5 −1]" 〗_(1×3) [■8(1&0&[email protected]&2&[email protected]&0&3)]_(3×3) [■8(𝑥@[email protected])]_(3×1) = O 〖"[x(1) + (−5) (0) + (–1)(2) x(0) +(– 5) (2) + (−1)0 x(2) + (– 5)(1) + (−1)(3)]" 〗_(1×3) [■8(𝑥@[email protected])] = O 〖"[x + 0 – 2 0 – 10 + 0 2x – 5 − 3]" 〗_(1×3) [■8(𝑥@[email protected])]_(3×1)= O 〖"[x – 2 – 10 2x – 8]" 〗_(1×3) [■8(𝑥@[email protected])]_(3×1) = O 〖"[(x – 2)(x) + (−10) (4) + (2x − 8) (1)]" 〗_(1×1) = O (x– 2)x – 10 (4) + 2x – 8 (1) = 0 x2 – 2x – 40 + 2x – 8 = 0 x2 + 0 – 48 = 0 x2 – 48 = 0 x2 = 48 x = ±√48 x = ±√(4 × 4 × 3) x = ± 4√3 Hence, x = ± 4√𝟑

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.