self Maths Puzzle

a=2, b^2-1=ab.find log(a^3+b^3) to the base (a+b).

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self Other Question

log((a+b)/3)=0.5(loga+logb). wat is the relation between a and b? a bag contains 3 black balls,3 yellow balls.A girl picks a ball and place it back in the bag. wat is the probability dat she selects a lack ball always ?