Question
Download Solution PDFమొదటి ఐదు త్రిభుజాకార సంఖ్యల సగటు ఏమిటి?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFత్రిభుజాకార సంఖ్య క్రింది షరతులను సంతృప్తిపరుస్తుంది,
X n = n (n + 1) /2
⇒ X 1 = 1
⇒ X 2 = 3
⇒ X 3 = 6
⇒ X 4 = 10
⇒ X 5 = 15
∴ మొదటి ఐదు త్రిభుజాకార సంఖ్య = (1 + 3 + 6 + 10 + 15) /5 = 7Last updated on Jul 17, 2025
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