alleryIf $A=[a_{ij}]$ is a $3\times3$ matrix with $a_{ij}=i+j$, then the element $a_{23}$ is:
A6
B23
C5
D4
Answer & Solution
Correct answer: C. 5
a_{23} = i + j with i=2, j=3 ⟹ 2 + 3 = 5.
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