Question

Nilai dari 3log7 - 3 3log3 + 1/2 3log81 - 3log63 adalah...
a. -3
b. -2
c. 0
d. 2
e. 3
Tolong sertakan caranya juga ya

Answer 1

3 log 7- 3 (3 log 3)
= 3 log 7- 3 log 27
= 3log (7/27)

1/2 (3 log 81)
3 log (3^4)^1/2
3 log (3^2)
3 log 9

3 log 63
3 log 9×7 = 3 log 9 + 3log 7

= 3log(7/27)+ 3 log 9 - 3 log 9 - 3 log 7
=3 log ((7/27))÷7
= 3 log (1/27)
= 3log 3^(-3)
= -3

a