Consider the following statements:
1. If the matrix \(\begin{pmatrix} a& 2 & -3 \\ b & c &5 \\ d & e& f \\ \end{pmatrix}\) is a skew-symmetric matrix, then a + b + c + d + e + f = 5
2. If A2 + A - I = 0, then A-1 is A + I.
Which of the above statements is/are correct?
1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2