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Określ dziedzine i rozwiąż równania.
a)
b)
c)
Daje NAJ NAJ NAJ
8
------- = 4 I*(x-2)
x-2
x-2 ≠ 0
x ≠ 2
D = R \ {2}
=========
4(x-2 = 8
4x-8 = 8
4x = 8+8
4x = 16 /:4
x = 4
====
5 1
------ = --- I*2(y-3)
y-3 2
y-3 ≠ 0
y ≠ 3
D = R \ {3}
y-3 = 2·5
y = 10+3
y = 13
=====
2x+1 x+2
------- = -------
x 2x
x ≠ 0
D = R \ {0}
2x(2x+1) = x(x+2)
4x²+2x = x²+2x
4x²-x² = 0
3x² = 0
x = 0 ∉ D
brak rozwiązania
x-2=0
x=2
D=R\{2}
8=4(x-2)
8=4x-8
4x=16
x=4
y-3=0
y=3
D=R\{3}
10=y-3
y=13
D=R\{0}
x(x+2)=2x(2x+1)
+2x=4+2x
=4
0=3
brak rozwiązań
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a)
8
------- = 4 I*(x-2)
x-2
x-2 ≠ 0
x ≠ 2
D = R \ {2}
=========
4(x-2 = 8
4x-8 = 8
4x = 8+8
4x = 16 /:4
x = 4
====
b)
5 1
------ = --- I*2(y-3)
y-3 2
y-3 ≠ 0
y ≠ 3
D = R \ {3}
=========
y-3 = 2·5
y = 10+3
y = 13
=====
c)
2x+1 x+2
------- = -------
x 2x
x ≠ 0
D = R \ {0}
=========
2x(2x+1) = x(x+2)
4x²+2x = x²+2x
4x²-x² = 0
3x² = 0
x = 0 ∉ D
brak rozwiązania
a)
x-2=0
x=2
D=R\{2}
8=4(x-2)
8=4x-8
4x=16
x=4
b)
y-3=0
y=3
D=R\{3}
10=y-3
y=13
c)
D=R\{0}
x(x+2)=2x(2x+1)
+2x=4+2x
=4
0=3
brak rozwiązań