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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