Displacement coordinate for a beam are shown in the given figure. The stiffness matrix is given by: [Take EI = 1 unit]
1
\(\left( {\begin{array}{*{20}{c}} 2&{0.5}\\ {0.5}&1 \end{array}} \right)\)
2
\(\left( {\begin{array}{*{20}{c}} 2&{ - 0.5}\\ { - 0.5}&1 \end{array}} \right)\)
3
\(\left( {\begin{array}{*{20}{c}} { - 2}&{0.5}\\ {0.5}&{ - 1} \end{array}} \right)\)
4
\(\left( {\begin{array}{*{20}{c}} 1&{0.5}\\ {0.5}&2 \end{array}} \right)\)