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  1. Chapter 10 Class 12 Vector Algebra
  2. Serial order wise

Transcript

Ex 10.2, 11 (Method 2) Show that the vectors 2๐‘– ฬ‚ โˆ’ 3๐‘— ฬ‚ + 4๐‘˜ ฬ‚ and โˆ’ 4๐‘– ฬ‚ + 6 ๐‘— ฬ‚ โˆ’ 8๐‘˜ ฬ‚ are collinear.๐‘Ž โƒ— = 2๐‘– ฬ‚ โˆ’ 3๐‘— ฬ‚ + 4๐‘˜ ฬ‚ ๐‘ โƒ— = โ€“4๐‘– ฬ‚ + 6๐‘— ฬ‚ โ€“ 8๐‘˜ ฬ‚ Two vectors are collinear if their directions ratios are proportional ๐‘Ž_1/๐‘_1 = ๐‘Ž_2/๐‘_2 = ๐‘_3/๐‘_3 = ๐œ† 2/(โˆ’4) = (โˆ’3)/6 = 4/(โˆ’8) = (โˆ’1)/2 Since, directions ratios are proportional Hence, ๐‘Ž โƒ— & ๐‘ โƒ— are collinear

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.