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v 㺺 㺺㺺 . Vv . (, , " 9")

: (a, b) (a, c) b = c. 1- vv v. x f v y "v" .

( v v).

. v . v , f v . g, h . 1- vv, f(x) 2- vv . (x, f(x)) . f(x) - . f(x) - . y = f(x) .

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  1. y = x2
  2. g(x) = { x=2 3; x=5 6.34; x=7 0 }
  3. h(x) = { x 1; 2 }

vv v . ̺ v vv .

1, 2, 4 - - . 3 - 2, 5, 7 v .

- v - D , D - . v f(x) - R , R - .

, vvv, , 㺺㺺 . 㺺 "" ( vv!):

f(x) = x3 + x - 1, g(t) = 5t5 + 52 . f(g(t)) = (5t5 + 52)3 + (5t5 + 52) - 1, g(f(x)) = 5(x3 + x - 1)5 + 52 .

f g f g . f vv .

f(x) = f(-x) f - ; f(x) = - f(-x) f - .

v . V vv , . v .

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