Вопрос школьника по предмету Математика
На координатной прямой отмечены точки C(−2,5) и B(7,1).
Найди координату точки K, если CK_BK=1:2,
и точка K расположена слева от точки C.
Ответ учителя по предмету Математика
Ответ:К(0,7)
Пошаговое объяснение: СК=х,тогда КВ=2х, СК+КВ=СВ
Определим длину отрезка СВ. СВ=2.,5+7,1=9,6
х+2х=9,6 3х=9,6, х=3,2
Точка К удалена от точки С на 3,2, определяем ее координату:
-2,5 +3,2=0.7, К(0,7)
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