Answer: \(t_{19} = 115\)
Here \(a = 7\), \(d = 13 - 7 = 6\), \(n = 19\).
\(t_n = a + (n-1)d\)
\(t_{19} = 7 + (19 - 1) \times 6 = 7 + 108 = 115\).
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Doubtly AI
· 24 Oct 2026
AI-verified · Oct 2026
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