Искакова, Маржан, Ғалымжан Аяғанов, and М. Даукен. “An Effective Way to Detect the Sum of the First N Term of an Arithmetic Progression”. Pedagogy and Psychology 44, no. 3 (September 30, 2020): 182–187. Accessed November 21, 2024. https://journal-pedpsy.kaznpu.kz/index.php/ped/article/view/105.