JEE Math Practice Question
If $$A = \left[ {\begin{matrix} {5a} & { - b} \\ 3 & 2 \\ \end{matrix} } \right]$$ and $$A$$ adj $$A=A$$ $${A^T},$$ then $$5a+b$$ is equal to :
- A.$$4$$
- B.$$13$$
- C.$$-1$$
- D.$$5$$
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