Вопрос школьника по предмету Алгебра
Найдите значение функции:
а) y = x^3 + 2x^2-5x + 3 при х = -1 7t + 2 2 y =————— при t = — 14t — 3 3
Ответ учителя по предмету Алгебра
а)y(-1) = (-1)³ + 2·(-1)²-5·(-1) + 3=-1+2+5+3=9
б) y(2/3)=(7*(2/3)+2)/(14*(2/3)-3)=((14/3)+2)/((28/3)-3)=(20/3)/(19/3)=20/19=1 целая (1/19)
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