Question

Tìm n biết    (n+\(\frac{1}{2}\))² =\(\frac{9}{25}\)

Answer 1

Ta có ( n + 1/2 )^2 = 9/25

Suy ra:( n + 1/2 )^2 = ( 3/5 )^2

Suy ra:  n+1/2  =  3/5  nên n = 3/5 - 1/2 =1/10

Vậy x=1/10

Tích đúng cho mình nha

Answer 2

\(\left(n+\frac{1}{2}\right)^2=\frac{9}{25}\)

=> \(\left(n+\frac{1}{2}\right)^2=\left(\frac{3}{5}\right)^2\)

=> \(n+\frac{1}{2}=\frac{3}{5}\)

=> \(n=\frac{3}{5}-\frac{1}{2}=\frac{1}{10}\)