Косанов Б, Қайыңбаев Ж, Ардабаева А. EXTREMUM PROBLEMS RELATED TO A LINEAR FUNCTION. Phys-Math [Internet]. 2022Mar.27 [cited 2024Nov.22];77(1):182-7. Available from: https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/656