Question

Tìm x sao cho x^8/9=729

Answer 1

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Answer 2

\(\frac{x^8}{9}=729\Leftrightarrow x^8=729.9\)

\(\Leftrightarrow x^8=6561\)

\(\Leftrightarrow x^8=\left(\pm3\right)^8\)

\(\Rightarrow x=3;-3\)

Nếu bạn chưa học số âm thì\(x=3\)

Answer 3

Học rồi toán lớp 7 mà pham trung thanh

Thanks^_^

Answer 4

x^ 8/9 = 729

<=> x^8 / 9 = 729

x^8 = 729 . 9 = 6561

x^8 = 3^8 = -3^8

Vậy x = 3 ; -3