Solution

In[49]:=

(*1*)A = {{a, b}, {c, d}, {e, f}} ; MatrixForm[A]

Out[49]//MatrixForm=

( {{a, b}, {c, d}, {e, f}} )

There are again two ways to do excercise 2

In[50]:=

(*2*)A[[1, 2]] Last[First[A]]

Out[50]=

b

Out[51]=

b

In[52]:=

(*3*)A[[3, 1]]

Out[52]=

e

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