20.07.2013 Views

1. Rovnice, nerovnice a soustavy

1. Rovnice, nerovnice a soustavy

1. Rovnice, nerovnice a soustavy

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

<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

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!