JEE MAIN - Mathematics Hindi (2016 (Offline) - No. 10)
यदि $$\mathrm{A}=\left[\begin{array}{cc}5 a & -b \\ 3 & 2\end{array}\right]$$ तथा $$\mathrm{A}$$ $$\mathrm{adj}$$ $$\mathrm{A}=\mathrm{A} ~\mathrm{A}^{\mathrm{T}}$$ हैं, तो $$5 a+b$$ बराबर है :
$$4$$
$$13$$
$$-1$$
$$5$$