Jee Main
Matrices And Determinants
JEE Main 2021 (Online) 31st August Evening Shift
INTEGER+4 / -12021
The number of elements in the set \(\left\{ {A = \left( {\matrix{
a & b \cr
0 & d \cr
} } \right):a,b,d \in \{ - 1,0,1\} \,and\,{{(I - A)}^3} = I - {A^3}} \right\}\), where I is 2 \(\times\) 2 identity matrix, is :