Question

knowing 2^n(A)= n(P(A)),
if n(P(A))=y, then n(A)=

Answer 1

\[2^{n(A)} = y\]
\[\ln (2^{n(A)}) = \ln y\]
\[n(A) \ln 2 = \ln y\]
\[n(A) = \frac{\ln y}{\ln 2}\]