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Question 1 Using the property of determinants and without expanding, prove that: |โ–ˆ(๐‘ฅ ๐‘Ž ๐‘ฅ+๐‘Ž@๐‘ฆ ๐‘ ๐‘ฆ+๐‘@๐‘ง ๐‘ ๐‘ง+๐‘)| = 0 โˆ† = |โ–ˆ(๐‘ฅ ๐‘Ž ๐‘ฅ+๐‘Ž@๐‘ฆ ๐‘ ๐‘ฆ+๐‘@๐‘ง ๐‘ ๐‘ง+๐‘)| C1 โ†’ C1 + C2 โˆ† = |โ–ˆ(๐’™+ ๐’‚ ๐‘Ž ๐’™+๐’‚@๐’š+๐’ƒ ๐‘ ๐’š+๐’ƒ@๐’› +๐’„ ๐‘ ๐’›+๐’„)| C1 and C3 is same โˆ† =๐ŸŽ By Property: if any two row or columns of a determinant are identical then value of determinant is zero

  1. Chapter 4 Class 12 Determinants
  2. Serial order wise

About the Author

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo