yg dilingkari gk perlu

Logaritma

78)
⁴ log 128 = ²^² log 2⁷
= 7/2 . ²log 2
= 7/2 (1)
= 7/2

79)
²log 3 . ³log 5. ⁵log 2 = ²log 2 = 1

80)
⁵log 7 . ⁷log 5⁻³ =
= - 3. ⁵log 7. ⁷log 5
= -3. (⁵log 5)
= - 3 (1)
= - 3