Question

Exprecao: M=(7^10)^5 :7^48
3)A professora escreveu a seguinte expressão no quadro. Então, o valor de M é: (A) 2. (B) 49. (C) 14. (D) 0.

Answer 1

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$m = (7 {}^{10} ) {}^{5} \div 7 {}^{48} \\ \\ 7 {}^{10 \times 5} \\ \\ 7 {}^{50} \\ \\ m = 7 {}^{50} \div 7 {}^{48} \\ \\ 7 {}^{50 - 48} \\ \\ 7 {}^{2} \\ \\ m = 7 {}^{2} \\ \\ m = 49$

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