Browsing by Author "Wahyuni, Irma"

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    BEBERAPA PENGEMBANGAN BARISAN DAN DERET PADA BILANGAN SEGITIGA
    (wahyu sari yeni, 2019-04-23) Wahyuni, Irma; Mashadi, Mashadi
    This articel discusses some development of numbers and series on triangular number. Then the development of numbers and series on triangular number involved in this study are the sum and difference in triangular number, the difference in the square of the triangular number, the sum of triangular number and the sum of the sum of triangular numbers. These are proved directly and using the concept of mathematical induction.