maths extra questions
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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)
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