Question

maths extra questions ​

Answer 1

Answer:

Step-by-step explanation:

a³+b³=ab(8-3a-3b)

(a+b)³-3ab(a+b)=8ab-3ab(a+b)

(a+b)³=8ab=2³ ab

{(a+b)/2 }³=ab

(a+b)/2=(ab)^1/3

taking log

log { (a+b)/2} =log(ab)^1/3

log ( a+b)/2 )=1/3 ( log(ab)

log ( a+b)/2 )=1/3 ( log a +log b)