Minggu, 08 September 2013

SIFAT - SIFAT LOGARITMA

Di Posting --> halysha ashryy di Minggu, September 08, 2013


~ Sifat - Sifat :
1. alog ax = X

2. log ab = log a+log b

3. alog ab = alog a + alog b ;a>0 ;b>0

4. log a = log a – log b
       b

5. alog a = alog a – alog b ;a>0 ;b>0
        b

 6. alog b = xlog b ;x>0 dan x≠1
             xlog a
             
 7. alog bn = n . alog b

8. a alogb = b

9. alog b . alog c = alog c

~ Persamaan :
alog f(x) = alog g(x) maka, f(x) = g(x)

~ Pertidaksamaan :
alog f(x) > alog g(x)

(i)   f(x) > g(x) untuk a>1
      f(x) < g(x) untuk 0
(ii)  f(x)>0
(iii) g(x)>0 
Himpunan penyelesaiannya = (i) ∩ (ii) ∩ (iii)


  

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