Question

`2.3^x+1=10.3^12+8.3^12`

Answer 1

\(\Rightarrow2\cdot3^{x+1}=3^{12}\cdot18=3^{14}\cdot2\)

=>x+1=14

hay x=13

Answer 2

`2 . 3^x + 1 = 10. 3^12 + 8 . 3^12`

` 2 . 3^x + 1 = 3^12 . (10 + 8)`

`2 . 3^x + 1 = 3^14 . 2`

`=> 1 = 3^14 . 2 - 2 . 3^x`

`=> 1 = 2(3^14 - 3^x)`

Vì `2(3^14 - 3^x) vdots 2` mà `1 cancel vdots 2`

`=>` Ptr vô nghiệm

Answer 3

`2.3^(x+1)=10.3^12+8.3^12`

`2.3^(x+1)=3^12 . (10+8)`

`2.3^(x+1)=3^12 . 18`

`2.3^(x+1)=3^12 . 3^2 . 2`

`2.3^(x+1)=3^14 . 2`

`3^(x+1)=3^14`

`x+1=14`

`x=13`

Answer 4

`2 . 3^(x+1) = 10 . 3^12 + 8 . 3^12`

`= 2 . 3^(x+1) = 3^12 . 18 = 3^14 . 2`

`=> x + 1 = 14 => x = 13`

Answer 5

`2.3^(x+1)=10.3^12+8.3^12`