Question

Срооочнооо, степени​

Answer 1

Ответ:

x=27✓3

Объяснение:

.................

Answer 2

a² - b² = (a - b)(a + b)

x^2/7 ≠ 2    x ≠ 2^7/2

x > 0

x^8/7 - 4 = (x^4/7)^2 - 2^2 = (x^4/7 - 2)(x^4/7 + 2)

x^4/7 - 4 = (x^2/7)^2 - 2^2 = (x^2/7 - 2)(x^2/7 + 2)

(x^4/7 - 4) / (x^2/7 - 2) = x^4/7 + 2

(x^8/7 - 4) / (x^4/7 + 2) = x^4/7 - 2

(x^8/7 - 4) / (x^4/7 + 2) - (x^4/7 - 4) / (x^2/7 - 2) = 2

x^4/7 - 2 - x^2/7 - 2 - 2 = 0

x^2/7 = t > 0

t^2 - t - 6 = 0

D = 1 + 24 = 25

t12 =(1 +- 5)/2 = -2   3

t = -2  нет

t = 3

x^2/7 = 3

⁷√x² = 3

x = 3^7/2