Question

tìm x

(3x-15)⁷=0

4²x-6=1

(3-x)^10x:(3-x)¹⁰=1(173)

 

Answer 1

a)x=5

b)x=7/8  

Answer 2

\(\left(3x-15\right)^7=0\Rightarrow3x-15=0\)

\(\Rightarrow3x=15\)

\(\Rightarrow x=5\)

\(4^2.x-6=1\Rightarrow16.x=7\)

\(\Rightarrow x=\frac{7}{16}\)

Answer 3

Đề bài câu cuối là gì vậy

Answer 4

\(\left(3x-15\right)^7=0\)

\(\Rightarrow3x-15=0\Rightarrow3x=3x-0=15\)

\(\Rightarrow x=15:3=5\)

\(4^2x-6=1\)

\(\Leftrightarrow8x-6=1\)\(\Rightarrow8x=8x-1=6\)

8 ; 6:  Ư(2)

Ta có bảng sau:

8	Ư(2): 4 ; 2 ; 1 ; 8	-4;-2;-1;-8
6	Ư(2): 6; 2 ; 4	-6;-2;-4

\(\left(3-x\right)^{10x}:\left(3-x\right)^{10}=1\left(173\right)\Leftrightarrow\left(3-x\right)^{10x}:\left(3-x\right)^{10}=173\)

\(\Rightarrow\left(3-x\right)^{10x}:10=\left(3-x\right)^{10}\)

\(\Rightarrow\left(3-x\right)^{10x}:\left(3-x\right)^{10}=173.10=1730\)

Sau đó tự làm nốt nha! Lười quá!