Check sibling questions

Ex 4.1, 7 (i) - Chapter 4 Class 12 Determinants (Term 1)

Last updated at March 30, 2023 by

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

Ex 4.1, 7 - Chapter 4 Class 12 Determinants - Part 2

 

Get live Maths 1-on-1 Classs - Class 6 to 12

Book 30 minute class for ₹ 499 ₹ 299

Transcript

Ex 4.1, 7 Find values of x, if (i) |■8(2&[email protected]&1)| = |■8(2x&[email protected]&x)|Calculating |■8(2&[email protected]&1)| = 2(1) – 5(4) = 2 – 20 = – 18 Calculating |■8(2x&[email protected]&x)| = 2x(x) – 6 × 4 = 2x2 – 24 Now |■8(2&[email protected]&1)| = |■8(2x&[email protected]&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

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

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.