dam NAJ....
wyznacz dziedzine wyrazenia wykonaj dzialania i zapisz otrzymane wyrazenie w najprostszej postaci
a)
b)
c)
D: x-2≠0 ∨ x+2≠0
x ≠ 2 x≠-2
x∈R\{-2,2}
3(x+2) x(x-2) 3x+6 + x²-2x x²+x+6 x²+x+6
--------- + ---------------=------------------ = ----------------=----------------
(x-2)(x+2) (x-2)(x+2) (x-2)(x+2) (x-2)(x+2) x²-4
D: a+b≠0
3-a-b -(a+b)+3 3-(a+b)
-------=--------------= --------------= 3
a+b a+b a+b
D: x-2≠0 ∨ x+3≠ 0
x≠2 x≠-3
x∈R\{-3,2}
x²+x-6 (x+3)(x-2) x+3
-------------------= ---------------------- = ----------------=
x-2(x²-3x+2/x+3) x-2(x²-3x+2/x+3) x²-3x+2/ x+3
=(x+3) : x²-3x+2/x+3 = (x+3) * (x+3)/x²-3x+2 =
= (x+3)²/x²-3x+2 = (x+3)²/(x-1)(x-2)
x²+x-6 postac iloczynowa: (x+3)(x-2)
x²-3x+2 postac iloczynowa : (x-1)(x-2)
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a)
D: x-2≠0 ∨ x+2≠0
x ≠ 2 x≠-2
x∈R\{-2,2}
3(x+2) x(x-2) 3x+6 + x²-2x x²+x+6 x²+x+6
--------- + ---------------=------------------ = ----------------=----------------
(x-2)(x+2) (x-2)(x+2) (x-2)(x+2) (x-2)(x+2) x²-4
b)
D: a+b≠0
3-a-b -(a+b)+3 3-(a+b)
-------=--------------= --------------= 3
a+b a+b a+b
c)
D: x-2≠0 ∨ x+3≠ 0
x≠2 x≠-3
x∈R\{-3,2}
x²+x-6 (x+3)(x-2) x+3
-------------------= ---------------------- = ----------------=
x-2(x²-3x+2/x+3) x-2(x²-3x+2/x+3) x²-3x+2/ x+3
=(x+3) : x²-3x+2/x+3 = (x+3) * (x+3)/x²-3x+2 =
= (x+3)²/x²-3x+2 = (x+3)²/(x-1)(x-2)
x²+x-6 postac iloczynowa: (x+3)(x-2)
x²-3x+2 postac iloczynowa : (x-1)(x-2)