Question

find the value offff

Answer 1

given
\[ 2^9 l^3 m^2 n^4= 3^7 \\ 2^3 l m^2= 3^9\]
find \(l m n\)
multiply the two expressions to get
\[ 2^{12} l^4 m^4 n^4 = 3^{16} \\ (lmn)^4 = 3^{16}2^{-12} \]
take the 4th root of both sides
\[ lmn= 3^42^{-3}= \frac{81}{8} \]

Answer 2

perfect!!