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Question 13 - CBSE Class 12 Sample Paper for 2020 Boards - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at March 30, 2023 by

If [1 2 2 1]Β  [xΒ  y] = [5 4] , then value of y is _______

If [1 2 2 1]Β  [xΒ  y] = [5 4] , then value of y is __ - Sample Paper

Question 13 - CBSE Class 12 Sample Paper for 2020 Boards - Part 2

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Question 13 If [β– 8(1&[email protected]&1)][β– 8(π‘₯@𝑦)] = [β– 8([email protected])], then value of y is _______ [β– 8(1&[email protected]&1)][β– 8(π‘₯@𝑦)] = [β– 8([email protected])] [β– 8(1Γ—π‘₯+2×𝑦@2Γ—π‘₯+1×𝑦)] = [β– 8([email protected])] [β– 8(π‘₯+2𝑦@2π‘₯+𝑦)] = [β– 8([email protected])] Therefore, x + 2y = 5 2x + y = 4 Now solving (1) and (2), Doing (2) – 2 Γ— (1) (2x + y) – 2 Γ— (x + 2y) = 4 – 2 Γ— 5 2x + y – 2x – 4y = 4 – 10 y – 4y = –6 –3y = –6 y = (βˆ’6)/(βˆ’3) y = 2 So, value of y is 2

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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.