yOz = 00
\(\Rightarrow5^{3n+3n+5+4n}\le10^{16}:2^{16}=5^{16}\)
\(\Rightarrow5^{10n+5}\le5^{16}\)
=> 10n + 5 < 16
=> 10n < 11
=> n = 1.
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yOz = 00
\(\Rightarrow5^{3n+3n+5+4n}\le10^{16}:2^{16}=5^{16}\)
\(\Rightarrow5^{10n+5}\le5^{16}\)
=> 10n + 5 < 16
=> 10n < 11
=> n = 1.