Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
If $A$ is a square matrix, then what is adj $A^{T}-(a d j A)^{\mathrm{T}}$ equal to?
MathematicsMatricesNDANDA 2010 (Phase 2)
Options:
  • A $2|A|$
  • B $2|A| I$
  • C Null Matrix
  • D Unit Matrix
Solution:
2222 Upvotes Verified Answer
The correct answer is: Null Matrix
We know $\left(\operatorname{adj} \mathrm{A}^{\mathrm{T}}\right)=(\operatorname{adj} \mathrm{A})^{\mathrm{T}}$
$\Rightarrow\left(\operatorname{adj} \mathrm{A}^{\mathrm{T}}\right)-(\operatorname{adj} \mathrm{A})^{\mathrm{T}}=$ Null matrix

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.