1.
If a,b,c>0a, b, c > 0 and x,y,z∈Rx, y, z \in R, then the determinant
∣(ax+a−x)2(ax−a−x)21(by+b−y)2(by−b−y)21(cz+c−z)2(cz−c−z)21∣\begin{vmatrix} (a^x+a^{-x})^2 & (a^x-a^{-x})^2 & 1 \\ (b^y+b^{-y})^2 & (b^y-b^{-y})^2 & 1 \\ (c^z+c^{-z})^2 & (c^z-c^{-z})^2 & 1 \end{vmatrix}
is equal to -