IOM 2021, Блиц — Задача 21

The Blitz-contest of IOM-2021

Условие

The figure shows the graph of y=f′(x)y = f'(x), the derivative of some function f(x)f(x), defined on the interval (−12,2)(-12, 2).

Graph of y = f′(x) on a square grid for x from −12 to 2, with the x and y axes, marks −12, 0, 2 on the x-axis and 1 on the y-axis; the curve starts below the axis at x = −12 (open circle), crosses zero near x = −11, rises to a maximum, falls through zero near x = −7, has a minimum, rises through zero near x = −4, has two humps, crosses zero near x = 1 and ends below the axis at x = 2 (open circle).

Consider the intervals of decrease of function f(x)f(x). Find the length of the longest such interval.

Отговори

Решение

Оригинал в Архива: iom-2021-blitz-tasks-eng.pdf · официални решения: iom-2021-blitz-answers-eng.pdf