Question

Tìm x thuộc N biết :

( x - 1 )³ = 125

Answer 1

\(\left(x-1\right)^3=125\)

\(\left(x-1\right)^3=5^3\)

\(x-1=5\)

\(x=5+1\)

\(\Rightarrow x=6\)

Answer 2

(x - 1)³=125

(x - 1)³=5³

=>x-1 =5

    x    =5+1

=>x    =6

Answer 3

(x-1)³=125=5³

\(\rightarrow\)x-1=5

       x=6