28. 10. 2009 | Rudolf Zrebný
↑ Hore
Neriešené príklady
Príklad 1:
Riešte lineárne rovnice v množine D = <-2;∞):
a) 6x – 7 = 6x + 4
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b) 4·(2x + 2) = 1 – 5x
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c) x + 2 = 2·(2 – 3x)
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d) 2·(x – 4) – (2x + 6) = 5x – 1
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e) 4·(3x – 3) – (5x + 2) = 2·(5x – 9)
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f) 2·(2x – 2) – (9x + 5) = -(3 + x)
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g) -(8x – 5) – 2·(2x + 4) – 9 = 4·(x – 2) – 4·(2 + x)
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h) 7x + 4·(2x – 1) – 2x + 7 = 5x – (x + 2 + 9x)
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i) 7x – 2·[3x – (-2 + x)] = 8
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j) [(4x – 1)·2 – 3x]·(-3) = 8x + 4
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k) 7x – 4[4x – 4·(3x – 3)] = (3x + 4)·(-2)
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Príklad 2:
Riešte lineárne rovnice pre x ∈ N:
b) – |
4 |
·(4x + 3) = 7x + 18 |
5 |
c) -5x – |
1 |
·(2x + 3) = 6 – 8x |
3 |
d) |
1 |
·(x + 2) + |
1 |
·(3x – 3) = 2x – |
3 |
3 |
2 |
4 |
e) (3x – 4) – |
3 |
·(3x + 2) = |
1 |
(x – 7) |
4 |
2 |
f) -4(4x + 2) – (4x – 2)· |
1 |
= -85 – 4·(x – 2) |
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2 |
g) (3x + 4) · |
3 |
– |
3 |
·(x + 4) = 2 + |
3 |
·(5x + 4) – |
11 |
|
4 |
4 |
4 |
4 |
h) (4x – 4)· |
1 |
– (x + 4) = – |
1 |
·(5x + 5) + |
17 |
x |
2 |
4 |
4 |
Príklad 3:
Riešte lineárne rovnice v danej množine D = (-7; 10):
g) |
x + 4 |
+ |
3x + 1 |
= 3 |
4 |
4 |
h) |
4x – 4 |
+ |
4x + 4 |
= |
3x + 1 |
|
5 |
5 |
2 |
i) |
3x – 2 |
– |
4x + 1 |
= |
2x + 5 |
– 3x |
2 |
3 |
2 |
j) x – |
3x – 3 |
– |
2x |
= 4·(x – |
11 |
) |
5 |
3 |
12 |
Príklad 4:
Riešte lineárne rovnice v množine racionálnych kladných čísel:
a) 5x·(5x – 1) = (5x – 1)·5x – 4x – 3
b) (6x – 3)2 – 4x = (6x + 2)·(6x – 2) + 4
c) (6x – 2)2 – (2x + 2)2 = 1 – (2x + 3)·(2x – 3) + 36x2
d) x·(2x – 1) + (11x + 5) = 2x·(5 + x) + 4
e) 5x – 2·(x + 1)2 = 5 – (2x – 1)·(x + 1)
Príklad 5:
Riešte lineárne rovnice v množine R:
b) |
3x + 5 |
– 5x = 3 – 5x |
3x – 1 |
c) |
3x |
– |
3 |
= 1 |
3x + 1 |
x + 4 |
d) |
4 |
+ |
2x |
= 1 |
4x2 – 1 |
2x + 1 |
e) |
2 |
– |
2 |
= |
4 |
4x + 4 |
4x – 4 |
16x2 – 16 |
- a) P={}; b) P={-7/13}; c) P={2/7}; d) -13/5 P={}; e) P={4/3}; f) P={-1,5}; g) P={1/3}; h) P={-5/18}; i) P={4}; j) P={2/23}; k) P={8/9}
- a) P={} lebo -10/3 ∉ N; b) P={} lebo -2 ∉ N; c) P={3}; d) P={4}; e) P={8}; f) P={5}; g) P={} lebo -1 ∉ N; h) P={4};
- a) P={1,5}; b) P={-1}; c) P={0,75}; d) P={2/3}; e) P={-0,2}; f) P={-7/22}; g) P={7/4}; h) P={5}; i) P={19/13}; j) P={1}
- a) P={} lebo -3/4 ∉ Q+; b) P={9/40}; c) P={} lebo -5/16 ∉ Q+; d) P={9}; e) P={4}
- a) P={-6}; b) P={4/3}; c) P={-0,7}; d) P={2,5}; e) P={}