Q.4 Consider a binary operation ∗ on the set {$\{1, 2, 3, 4, 5\}$ given by the following multiplication table (Table 1.2).(iii) Compute (2 ∗ 3) ∗ (4 ∗ 5).(Hint: use the following table)

(iii) (2 ∗ 3) ∗ (4 ∗ 5).

from the above table

$(2*3)*(4*5)=1*1=1$

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