Question

Tìm a

a / 2 = 8 / a

Giúp với!!!!

Answer 1

\(\dfrac{a}{2}=\dfrac{8}{a}\)
\(\Rightarrow a.a=8.2=16\)
\(\Leftrightarrow a^2=16\Rightarrow\left[{}\begin{matrix}a=4\\a=-4\end{matrix}\right.\)

Answer 2

a = 4

Answer 3

\(\dfrac{a}{2}=\dfrac{8}{a}\)

\(\Rightarrow\)\(a.a=8.2\)

\(a^2=16\)

\(\Rightarrow4^2=16\)

\(\Rightarrow\)\(a=4\)