Введение в математический анализ в вопросах и задачах. Анчиков А.М - 67 стр.

UptoLike

x = 1
c) f(x) = x [x] x = k (k = 0, ±1, ±2, ...
d) f(x) = 1 e
1
/
x
2
. x = 0
e) f(x) = ln
x
2
(x + 1)(x 3)
. x = 1 x = 3
f) f(x) =
x
2
0 x 1,
2 x 1 < x 2.
g) f(x) =
ctg
2
πx x,
0 x.
x = k, (k = 0, ±1, ±2, ...)
[ Ðàçðûâíà ïðè x = 1 ].
   c) f (x) = x − [x] [ x = k (k = 0, ±1, ±2, ... - òî÷êè ðàçðûâà
ïåðâîãî ðîäà ].
   d) f (x) = 1 − e−1/x . [ x = 0 − óñòðàíèìàÿ òî÷êà ðàçðûâà ].
                        2



                        x2
    e) f (x) = ln               . [ x = −1 è x = 3 - òî÷êè
                 (x + 1)(x − 3)
áåñêîíå÷íîãî ðàçðûâà ].
                 
                   x2 ïðè 0 ≤ x ≤ 1,
   f ) f (x) =                               [ Íåïðåðûâíà ].
                  2 − x ïðè 1 < x ≤ 2.
              
               ctg 2 πx äëÿ íåöåëîãî x,
   g) f (x) =
                  0     äëÿ öåëîãî x.
[ x = k, (k = 0, ±1, ±2, ...) - òî÷êè áåñêîíå÷íîãî ðàçðûâà ].




                               67