If the stiffness matrix of a beam element is given by -
[K] = \(\frac{{EI}}{L}\left[ {\begin{array}{*{20}{c}} a&{ b}& ...\\ {c }&d&...\\ {\vdots}&{\vdots}&{\ddots} \end{array}} \right]_{m\times n}\)
Here, a, b, c, and d represent the four elements of the stiffness matrix.
Which of the following is/are correct if n = 2?
1
a < 0
2
b = c
3
m ≠ n
4
d > 0