Matrices and Determinants 2 Question 29

«««< HEAD

32. The determinants |1abc 1bca 1cab| and |1aa2 1bb2 1cc2| are not identically equal.

======= ####32. The determinants |1abc1bca1cab| and |1aa21bb21cc2| are not identically equal.

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed

(1983, 1M)

Show Answer

Answer:

Correct Answer: 32. False

Solution:

  1. Let Δ=|1abc1bca1cab|=1abc|aa2abcbb2abccc2abc|

Applying R1aR1,R2bR2,R3cR3

=1abcabc |aa21bb21cc21| =|1aa21bb21cc2|

|1abc1bca1cab| =|1aa21bb21cc2|

Hence, statement is false.



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक