Question

nhanh nha, tớ tick cho

Answer 1

`@` `\text {Ans}`

`\downarrow`

`a)`

`x^n = 1`

Mà `n \in NN`$*$

`=> n \ne 0`

`=> x = 1`

Vậy, `x = 1`

`b)`

`x^n = 0`

`=> x = 0`

`c)`

`x^2 = 9`

`=> x^2 = (+-3)^2`

`=> x = +-3`

Vậy, `x \in {-3; 3}`

`d)`

`3^x = 9`

`=> 3^x = 3^2`

`=> x = 2`

Vậy, `x = 2`

`e)`

`x^4 = 1`

`=> x^4 = 1^4`

`=> x = 1`

Vậy, `x = 1`

`f)`

`5^x = 25`

`=> 5^x = 5^2`

`=> x = 2`

Vậy, `x = 2.`

Answer 2

tìm x nha