a²+ b² = 7ab,
(a+b)²-2ab=7ab
a+b=√(9ab)=3√ab
log ( (a + b)/3 )=log3√(ab)/3
= log√ab
=log√a+log√b
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a²+ b² = 7ab,
(a+b)²-2ab=7ab
a+b=√(9ab)=3√ab
log ( (a + b)/3 )=log3√(ab)/3
= log√ab
=log√a+log√b