Question

[Chu Thị Khánh Chi]

(x^5)^2=x^18/x^7

Answer 1

[Cao Tùng Lâm]

${\left(x^5\right)}^2=\frac{x^{18}}{x^7}\left(đk:x\ne 0\right)$

$\Rightarrow x^{10}=x^{11}$

$\Rightarrow x^{11}-x^{10}=0$

$\Rightarrow x^{10}\left(x-1\right)=0$

$\Rightarrow [\begin{array}{c}x=0\left(ktm\right)\\ x=1\left(tm\right)\end{array}$

Answer 2

[❖×✔ᴍê ʜọᴄ)ミ★ ❖(☂TΣΔM☂STUDIΣS☂)ミ★]

(x4)3=x18x7(x4)3=x18x7

⇔ x12=x11x12=x11

⇔ x12−x11=0x12−x11=0

⇔ x11.(x−1)=0x11.(x−1)=0

⇔ [x11=0x−1=0[x11=0x−1=0

⇔ [x=0x=0+1=1[x=0x=0+1=1

Vậy xx ∈ {0;1}