Question

1) diket : log 2 = 0,3010 ; log 3 =0,4771 ; log 7 =0,8451. tentukan:
a. log 18 c. log 10,5
b. log 21 d. log 1/7
2) sederhanakan :
a. 2/3 x 2 log 64 - 1/2 x 2 log 16
b. 2 log 2x+3 (a log x - a log y)
c. a log a/akar x - a log akar ax
d. log akar a + log akar b = 1/2 log ab

Answer 1

A. log 18 = log 2 + log 3 + log 3
= 0,3010 + 0,4771 + 0,4771
= 1,2552
b. log 21 = log 3 + log 7
= 0,4771 + 0,8451
= 1,3222
c. log 1/7 = - log 7
= - 0,8451

Answer 2

1.a) log 18 = log (2.3.3)
= log 2 + log 3 + log 3
= 0,3010 + 0,4771 + 0,4771
= 1,2552

maaf hanya satu yg saya bisa jawab,karna hari sudah larut malam... Semoga bermanfaat...