Question

Jika log 2 =a dan log 5 = b,maka 5² log 20 adalah.....

Answer 1

semoga membantu ya :)

Answer 2

5^2 log 20 = 5^2 log 4*5
= 5^2 log 4 + 5^2 log 5
= 1/2 5 log 2^2 + 1/2 5 log 5
= 2/2 5 log 2 + 1/2 5 log 5
= 5a + 5/2 b