Question

tim phan so 1 / a , biet :                       1 / a + 1 /  4 = 3 / 8

Answer 1

 Ta có: 1 / a + 1 / 4 = 3 / 8

=> 1 / a + 2 / 8 = 3 / 8

=> 1 / a            = 3 / 8 - 2 / 8

=> 1 / a            = 1 / 8

vậy 1/a = 1/8

Answer 2

p/s do la p/s 1/8

Answer 3

Thái Nguyên chép sai đề rồi

Answer 4

\(\frac{1}{a}+\frac{1}{4}=\frac{3}{8}\) 

\(\Leftrightarrow\)\(\frac{1}{a}=\frac{3}{8}-\frac{1}{4}=\frac{1}{8}\)

\(\Rightarrow a=8\) 

Vậy \(a=8\)