1.

Prove that ∣∣∣∣111abca3b3c3∣∣∣∣=(a−b)(b−c)(c−a)(a+b+c)

Answer»

Prove that
∣∣
∣
∣
111abca3b3c3∣∣
∣
∣
=(a−b)(b−c)(c−a)(a+b+c)



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