`a[[b,c],[d,e]]`

If A={a,b},B={c,d},C={d,e} then {(a,c),(a,d)(a,e),(b,c),(b,d),(b,e)}=

If A={a,b},B={c,d},C={d,e} , then {(a,c),(a,d),(a,e),(b,c),(b,d),(b,e)} is equal to

Let A={a,b,c,d},B={b,c,d,e). Then n((A xx B)nn(B xx A)) is

For rational numbers (a)/(b), (c )/(d) and (e )/(f) we have (a)/(b) xx ((c )/(d) +(e )/(f))= ______ + _______.

In Fig. 7.21, A C\ =\ A E , A B\ =\ A D and /_B A D\ =/_E A C . Show that B C\ =\ D E .