Question

x mũ 10 : x mũ 7 = 1 phần 27

Ai chỉ em bài này với ạ

 

Answer 1

Answer 2

x¹⁰ : x⁷ =\(\dfrac{1}{27}\)

= x³ = \(\dfrac{1}{27}\)

= \(\dfrac{1}{3}\)

Answer 3

x¹⁰ : x⁷ = \(\dfrac{1}{27}\)

⇔ x^{10 - 7} = \(\dfrac{1}{27}\)

⇔ x³ = \(\dfrac{1}{27}\)

⇔ x = \(\dfrac{\sqrt{1}}{\sqrt{27}}\)

⇔ x = \(\dfrac{1}{3}\)

 

Answer 4

Ta có: \(x^{10}:x^7=\dfrac{1}{27}\)

\(\Leftrightarrow x^3=\dfrac{1}{27}\)

hay \(x=\dfrac{1}{3}\)