Question

решите 4 и 5 задание​

Answer 1

Ответ:

4)

$(3 {}^{3} + 4) \times 3 {}^{x - 1} = 279 \\ (27 + 4) \times 3 {}^{x - 1} = 279 \\ 31 \times 3 {}^{x - 1} = 279 \\ 3 {}^{x - 1} = 9 \\ 3 {}^{x - 1} = 3 {}^{2} \\ x - 1 = 2 \\ x = 3$

5)