[tex]a_{n} = 3n-19\\\\a_{n} < 0\\\\n \in N+\\\\3n-19 < 0\\\\3n < 19 \ \ \ |:3\\\\n < 6,(3)\\\\n \in \{1,2,3,4,5,6\}[/tex]
Wyrazy ujemne, to: a₁, a₂, a₃, a₄, a₅, a₆.
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[tex]a_{n} = 3n-19\\\\a_{n} < 0\\\\n \in N+\\\\3n-19 < 0\\\\3n < 19 \ \ \ |:3\\\\n < 6,(3)\\\\n \in \{1,2,3,4,5,6\}[/tex]
Wyrazy ujemne, to: a₁, a₂, a₃, a₄, a₅, a₆.