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<strong>Rovnice</strong>, <strong>nerovnice</strong> a <strong>soustavy</strong> 17<br />
3. |1 − x| + |x| = −1 [Nemá řešení]<br />
4. x 2 + 2|x − 1| = 6 [1 − √ 5, 2]<br />
5.<br />
6.<br />
1<br />
|x − 1| = |x + 1| [0, ±√ 2]<br />
−2(1 − x2 )<br />
|1 − x2 |(1 + x2 = 0 [Nemá řešení]<br />
)<br />
7. 0, 25 2−x = 256<br />
2 x+3<br />
8. 3 2x−1 + 3 2x−2 − 3 2x−4 = 315 [3]<br />
9.<br />
1<br />
5x + 5x = 26<br />
5<br />
10. Vypočítejte y z rovnice x = ey − e −y<br />
1<strong>1.</strong> Vypočítejte y z rovnice x = ey − e −y<br />
2<br />
e y + e −y<br />
[3]<br />
[1, −1]<br />
y = ln(x + √ 1 + x 2 ) <br />
<br />
y = 1<br />
<br />
1 + x<br />
ln ; |x| < 1<br />
2 1 − x<br />
12. log(x + 13) − log(x − 3) = 1 − log 2 [7]<br />
13.<br />
14.<br />
15.<br />
log(2x + 3)<br />
log(x + 5)<br />
= 2 [Nemá řešení]<br />
ln x − 1<br />
ln 2 = 0 [e]<br />
x<br />
− ln x + 2<br />
x ln 3 x = 0 [e2 ]<br />
16. 1 − cos x = 0 [2kπ, k ∈ Z]<br />
17. tg x = 1 [ π<br />
+ kπ, k ∈ Z]<br />
4<br />
18. sin 2x = cos x<br />
<br />
(2k + 1) π<br />
<br />
π 5<br />
, + 2kπ , π + 2kπ , k ∈ Z<br />
2 6 6<br />
19. sin 2x = tg x, x ∈ 〈0, 2π)<br />
Řešte v R <strong>nerovnice</strong>:<br />
<strong>1.</strong> |x − 3| < 1<br />
4<br />
2.<br />
|2x − 2|<br />
2 − x<br />
< 1<br />
3. |3x − 1| < |x| < |3x + 1|<br />
<br />
0 , π<br />
4<br />
, π , 3<br />
4<br />
5 7<br />
π , π ,<br />
4 4 π<br />
<br />
<br />
11 13<br />
;<br />
4 4<br />
<br />
0, 4<br />
<br />
∪ (2, ∞)<br />
3<br />
<br />
1 1<br />
;<br />
4 2