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Let Deltat=|(a1,b1,c1),(a2,b2,c2),(a3,b3...

Let `Delta_t=|(a_1,b_1,c_1),(a_2,b_2,c_2),(a_3,b_3,c_3)|and Delta_2=|(alpha_1,beta_1,gamma_1),(alpha_2,beta_2,gamma_2),(alpha_3,beta_3,gamma_3)|,` then `Delta_1 xx Delta_2` can be expressed as the sum of how many determinants ?

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